MLB Players with Last Names Starting with "B"
| Player | Pos | Height / Weight | Birth Date (Age) | College |
|---|---|---|---|---|
| Zak Baayoun COL | SP | 6' 1" / 180 lbs | May 1, 1998 (25) | Long Beach State |
| Tyler Baca WSH | OF | 5' 9" / 180 lbs | May 22, 2000 (23) | Biola (CA) |
| Lake Bachar SD | SP | 6' 3" / 215 lbs | Jun 3, 1995 (28) | Wisconsin-Whitewater |
| Sam Bachman LAA | SP | 6' 1" / 235 lbs | Sep 30, 1999 (24) | Miami (OH) |
| Kyle Backhus ARI | RP | 6' 4" / 185 lbs | Jan 21, 1998 (26) | Sam Houston State |
| Mahki Backstrom | 1B | 6' 5" / 220 lbs | Oct 10, 2001 (22) | None |
| Troy Bacon | RP | 6' 0" / 165 lbs | Sep 26, 1996 (27) | Santa Fe JC (FL) |
| Dakota Bacus | RP | 6' 2" / 200 lbs | Apr 2, 1991 (33) | Indiana State |
| Akil Baddoo DET | LF | 6' 1" / 214 lbs | Aug 16, 1998 (25) | None |
| Harrison Bader NYM | CF | 6' 0" / 210 lbs | Jun 3, 1994 (29) | Florida |
| Ji Hwan Bae PIT | 2B | 5' 11" / 185 lbs | Jul 26, 1999 (24) | None |
| Javier Báez DET | SS | 6' 0" / 190 lbs | Dec 1, 1992 (31) | None |
| Pedro Báez | RP | 6' 0" / 232 lbs | Mar 11, 1988 (36) | None |
| Sandy Baez | RP | 6' 2" / 245 lbs | Nov 25, 1993 (30) | None |
| Michel Baez | RP | 6' 8" / 220 lbs | Jan 21, 1996 (28) | None |
| Jeffrey Baez | RF | 6' 0" / 180 lbs | - | None |
| Joan Baez | RP | 6' 3" / 190 lbs | Dec 26, 1994 (29) | None |
| Franyel Baez ARI | CF | 6' 3" / 170 lbs | Mar 1, 2003 (21) | None |
| Henry Baez SD | SP | 6' 3" / 175 lbs | Oct 12, 2002 (21) | None |
| Rony Baez CHC | P | 6' 0" / 180 lbs | Apr 21, 1999 (24) | None |
| Joel Baez | RP | 6' 4" / 185 lbs | Aug 19, 2002 (21) | None |
| Joshua Baez STL | RF | 6' 3" / 220 lbs | Jun 28, 2003 (20) | None |
| Luis Baez | CF | 5' 11" / 170 lbs | Nov 23, 2000 (23) | None |
| Luis Baez HOU | RF | 6' 1" / 205 lbs | Jan 11, 2004 (20) | None |
| Jesus Baez NYM | SS | 5' 10" / 180 lbs | Feb 26, 2005 (19) | None |
| Nate Baez MIN | C | 5' 11" / 191 lbs | May 17, 2001 (22) | Arizona State |
| Mario Baez ATL | SS | 5' 9" / 175 lbs | Aug 25, 2006 (17) | None |
| Jarol Baez STL | RP | 6' 1" / 200 lbs | Oct 21, 2005 (18) | None |
| Jose Baez | SS | 5' 9" / 146 lbs | Aug 30, 2002 (21) | None |
| Juan Baez MIL | IF | 5' 9" / 175 lbs | Jun 27, 2005 (18) | None |
| Manuel Baez SEA | C | 5' 9" / 192 lbs | May 22, 2005 (18) | None |
| Ben Baggett TOR | RP | 6' 0" / 195 lbs | Feb 28, 1996 (28) | None |
| Jason Bahr | SP | 6' 5" / 195 lbs | Feb 15, 1995 (29) | Central Florida |
| Homer Bailey | SP | 6' 4" / 223 lbs | May 3, 1986 (37) | None |
| Brandon Bailey | SP | 5' 10" / 195 lbs | Oct 19, 1994 (29) | Gonzaga |
| Benyamin Bailey CHW | LF | 6' 4" / 215 lbs | Sep 18, 2001 (22) | None |
| Patrick Bailey SF | C | 6' 0" / 210 lbs | May 29, 1999 (24) | North Carolina State |
| Jeff Bain | SP | 6' 4" / 200 lbs | Mar 3, 1996 (28) | California |
| Max Bain CHC | RP | 6' 5" / 240 lbs | Sep 25, 1997 (26) | Northwood (MI) |
| J.T. Bain TOR | SS | 6' 1" / 160 lbs | - | None |
| Dusty Baker | - | - / - | - | - |
| Chris Baker | SS | 6' 1" / 180 lbs | - | None |
| Luken Baker STL | 1B | 6' 4" / 285 lbs | Mar 10, 1997 (27) | Texas Christian |
| Bryan Baker BAL | RP | 6' 6" / 235 lbs | Dec 2, 1994 (29) | North Florida |
| Dru Baker TB | CF | 5' 11" / 205 lbs | Mar 22, 2000 (24) | Texas Tech |
| Trent Baker STL | SP | 6' 3" / 243 lbs | Dec 28, 1998 (25) | Angelo State |
| Andrew Baker PHI | RP | 6' 1" / 190 lbs | Mar 24, 2000 (24) | Chipola JC (FL) |
| Robbie Baker | RP | 6' 1" / 185 lbs | Jan 31, 1995 (29) | Richmond |
| Darren Baker WSH | 2B | 5' 10" / 180 lbs | Feb 11, 1999 (25) | California |
| Alec Baker ARI | RP | 6' 3" / 202 lbs | Dec 4, 1999 (24) | Dallas Baptist |
| Tavano Baker BOS | OF | 5' 11" / 160 lbs | Oct 13, 2006 (17) | None |
| Yasiel Balaguert | 1B | 6' 2" / 215 lbs | Jan 9, 1993 (31) | None |
| Jordan Balazovic MIN | SP | 6' 5" / 215 lbs | Sep 17, 1998 (25) | None |
| Leonardo Balcazar CIN | SS | 5' 10" / 190 lbs | Jun 17, 2004 (19) | None |
| Dayker Baldallo OAK | SS | 5' 10" / 135 lbs | Nov 29, 2003 (20) | None |
| Rocco Baldelli | RF | - / - | Sep 25, 1981 (42) | - |
| Luis Baldiris MIA | RP | 5' 11" / 150 lbs | May 7, 2004 (19) | None |
| Merrick Baldo WSH | RP | 6' 1" / 200 lbs | Jul 17, 2000 (23) | Loyola Marymount |
| Alberto Baldonado | RP | 6' 5" / 270 lbs | Feb 1, 1993 (31) | None |
| Roberto Baldoquin | SS | 5' 11" / 199 lbs | May 14, 1994 (29) | None |
| Roldani Baldwin | C | 5' 11" / 207 lbs | Mar 16, 1996 (28) | None |
| Logan Baldwin | RF | 6' 0" / 190 lbs | Apr 9, 1996 (28) | Georgia Southern |
| Drake Baldwin ATL | C | 6' 1" / 210 lbs | Mar 28, 2001 (23) | Missouri State |
| Brooks Baldwin CHW | 3B | 6' 2" / 175 lbs | Aug 15, 2000 (23) | UNC Wilmington |
| Cam Balego CHC | 1B | 5' 11" / 205 lbs | Jun 12, 1995 (28) | Mercyhurst (PA) |
| Matt Ball | SP | 6' 5" / 200 lbs | Jan 23, 1995 (29) | None |
| Bryce Ball PHI | 1B | 6' 4" / 240 lbs | Jul 8, 1998 (25) | Dallas Baptist |
| Moises Ballesteros CHC | C | 5' 10" / 195 lbs | Nov 8, 2003 (20) | None |
| Anthony Banda CLE | SP | 6' 2" / 221 lbs | Aug 10, 1993 (30) | San Jacinto JC (TX) |
| Scott Bandura SF | OF | 6' 4" / 190 lbs | Aug 2, 2001 (22) | Princeton |
| Jett Bandy | C | 6' 4" / 235 lbs | Mar 26, 1990 (34) | Arizona |
| Will Banfield MIA | C | 6' 1" / 207 lbs | Nov 18, 1999 (24) | None |
| Nick Banks | RF | 6' 0" / 215 lbs | Nov 18, 1994 (29) | Texas A&M |
| Tanner Banks CHW | RP | 6' 1" / 205 lbs | Oct 24, 1991 (32) | Salt Lake CC (UT) |
| Pierce Banks | RP | 6' 0" / 205 lbs | Mar 31, 1998 (26) | None |
| Brett Banks NYM | RP | 6' 3" / 205 lbs | Oct 3, 2001 (22) | UNC Wilmington |
| Zion Bannister TEX | LF | 6' 3" / 189 lbs | Sep 9, 2001 (22) | None |
| Rylan Bannon NYM | 3B | 5' 8" / 180 lbs | Apr 22, 1996 (27) | Xavier |
| Manny Bañuelos | RP | 5' 10" / 215 lbs | Mar 13, 1991 (33) | None |
| David Banuelos BAL | C | 6' 0" / 205 lbs | Oct 1, 1996 (27) | Long Beach State |
| Anthony Baptist NYM | OF | 5' 11" / 155 lbs | Oct 17, 2005 (18) | None |
| Anthony Baptist NYM | OF | - / - | - | - |
| Caleb Baragar | SP | 6' 3" / 215 lbs | Apr 9, 1994 (30) | Indiana |
| Edward Baram OAK | RP | 6' 3" / 205 lbs | Jun 2, 1997 (26) | Adelphi (NY) |
| Colin Barber HOU | RF | 6' 0" / 200 lbs | Dec 4, 2000 (23) | None |
| Albertus Barber | RP | 6' 2" / 190 lbs | Feb 18, 1996 (28) | Oklahoma Baptist |
| Noah Barber KC | OF | 6' 3" / 180 lbs | May 3, 2005 (18) | None |
| Gabriel Barbosa NYY | SP | 6' 0" / 183 lbs | Jan 22, 2002 (22) | None |
| Julian Barboza COL | P | 6' 2" / 196 lbs | Oct 16, 2006 (17) | None |
| Edgar Barclay NYY | RP | 5' 10" / 200 lbs | May 25, 1998 (25) | Cal State Bakersfield |
| Hunter Barco PIT | SP | 6' 4" / 210 lbs | Dec 15, 2000 (23) | Florida |
| Daniel Bard COL | RP | 6' 4" / 215 lbs | Jun 25, 1985 (38) | North Carolina |
| Luke Bard TOR | RP | 6' 3" / 200 lbs | Nov 13, 1990 (33) | Georgia Tech |
| Matthew Barefoot | CF | 6' 0" / 205 lbs | Sep 20, 1997 (26) | Campbell |
| Cristopher Barete TB | CF | 5' 9" / 155 lbs | Dec 10, 2001 (22) | None |
| Addison Barger TOR | 3B | 6' 0" / 210 lbs | Nov 12, 1999 (24) | None |
| Alec Barger COL | RP | 6' 2" / 201 lbs | Mar 24, 1998 (26) | North Carolina State |
| Brandon Barker KC | RP | 6' 3" / 210 lbs | Aug 20, 1992 (31) | Mercer |
| Luke Barker SEA | RP | 6' 3" / 230 lbs | Mar 11, 1992 (32) | Cal State Chico |
| Jordy Barley WSH | SS | 5' 11" / 175 lbs | Dec 3, 1999 (24) | None |
| Scott Barlow CLE | RP | 6' 3" / 210 lbs | Dec 18, 1992 (31) | None |
| Joe Barlow CHW | RP | 6' 2" / 210 lbs | Sep 28, 1995 (28) | Salt Lake CC (UT) |
| Trysten Barlow COL | RP | 6' 1" / 215 lbs | Dec 31, 1996 (27) | Mississippi State |
| Matt Barnes WSH | RP | 6' 4" / 208 lbs | Jun 17, 1990 (33) | Connecticut |
| Brandon Barnes | CF | 6' 2" / 210 lbs | May 15, 1986 (37) | Cypress CC |
| Austin Barnes LAD | C | 5' 10" / 187 lbs | Dec 28, 1989 (34) | Arizona State |
| Jacob Barnes WSH | RP | 6' 2" / 231 lbs | Apr 14, 1990 (34) | Florida Gulf Coast |
| Danny Barnes | RP | 6' 1" / 215 lbs | Oct 21, 1989 (34) | Princeton |
| Charlie Barnes | SP | 6' 2" / 190 lbs | Oct 1, 1995 (28) | Clemson |
| Zach Barnes ARI | RP | 6' 0" / 180 lbs | Apr 10, 1999 (25) | Grand Canyon |
| Mason Barnett KC | SP | 6' 0" / 218 lbs | Nov 7, 2000 (23) | Auburn |
| Tony Barnette | RP | 6' 1" / 190 lbs | Nov 9, 1983 (40) | Arizona State |
| Darwin Barney | 2B | 5' 10" / 180 lbs | Nov 8, 1985 (38) | Oregon State |
| Tucker Barnhart ARI | C | 5' 11" / 192 lbs | Jan 7, 1991 (33) | None |
| Hunter Barnhart TB | SP | 6' 2" / 205 lbs | Feb 14, 2002 (22) | None |
| Zane Barnhart BAL | RP | 5' 10" / 205 lbs | May 30, 2002 (21) | Hillsdale |
| Boston Baro NYM | SS | 6' 2" / 175 lbs | Aug 23, 2004 (19) | None |
| Steven Baron | C | 6' 0" / 205 lbs | Dec 7, 1990 (33) | None |
| Cole Barr SEA | 3B | 5' 11" / 195 lbs | May 23, 1998 (25) | Indiana |
| Kyle Barraclough | RP | 6' 3" / 229 lbs | May 23, 1990 (33) | Saint Mary's (CA) |
| Antonio Barranca | C | 6' 3" / 215 lbs | Jul 25, 2001 (22) | None |
| Chris Barraza LAA | SP | 6' 0" / 196 lbs | Dec 3, 1999 (24) | Arizona |
| Elis Barreat TB | 2B | 5' 9" / 158 lbs | May 22, 2003 (20) | None |
| Manny Barreda | RP | 5' 11" / 195 lbs | Oct 8, 1988 (35) | None |
| Luis Barrera | CF | 6' 0" / 195 lbs | Nov 15, 1995 (28) | None |
| Tres Barrera | C | 6' 0" / 206 lbs | Sep 15, 1994 (29) | Texas |
| Diego Barrera OAK | P | 6' 0" / 165 lbs | May 5, 2000 (23) | Loyola Marymount |
| Jose Barrero TEX | SS | 6' 2" / 211 lbs | Apr 5, 1998 (26) | None |
| Franklin Barreto | 2B | 5' 10" / 200 lbs | Feb 27, 1996 (28) | None |
| Derwin Barreto TEX | 2B | 5' 9" / 160 lbs | Sep 1, 2000 (23) | None |
| Isaac Barreto LAD | OF | 6' 0" / 178 lbs | May 25, 2004 (19) | None |
| Aaron Barrett | RP | 6' 3" / 230 lbs | Jan 2, 1988 (36) | Mississippi |
| Jake Barrett | RP | 6' 2" / 240 lbs | Jul 22, 1991 (32) | Arizona State |
| Jaime Barría CLE | RP | 6' 1" / 210 lbs | Jul 18, 1996 (27) | None |
| Erick Barria | SS | 5' 11" / 155 lbs | Jan 31, 2003 (21) | None |
| Brandon Barriera TOR | SP | 6' 2" / 180 lbs | Mar 4, 2004 (20) | Vanderbilt |
| Alberto Barriga ARI | C | 5' 9" / 155 lbs | Nov 15, 2004 (19) | None |
| Malik Barrington MIN | P | 6' 2" / 236 lbs | Oct 8, 1997 (26) | Albany State |
| Gregory Barrios MIL | SS | 6' 0" / 180 lbs | Apr 8, 2004 (20) | None |
| Johan Barrios MIL | SS | 6' 1" / 180 lbs | Jan 8, 2005 (19) | None |
| Jorge Barrosa ARI | LF | 5' 5" / 165 lbs | Feb 17, 2001 (23) | None |
| Beycker Barroso TEX | OF | 5' 10" / 160 lbs | Jan 24, 2000 (24) | None |
| Luis Barroso BAL | P | 6' 3" / 165 lbs | Sep 7, 1998 (25) | None |
| Braden Barry TOR | OF | 6' 4" / 190 lbs | Feb 6, 2002 (22) | West Virgina |
| Cameron Barstad MIA | C | 6' 0" / 160 lbs | Nov 29, 2000 (23) | None |
| Joey Bart PIT | C | 6' 2" / 238 lbs | Dec 15, 1996 (27) | Georgia Tech |
| Cole Bartlett | RP | 6' 2" / 189 lbs | Dec 22, 1994 (29) | Missouri |
| Will Bartlett CLE | 1B | 6' 3" / 215 lbs | Feb 2, 2001 (23) | None |
| Caleb Bartolero LAA | C | 6' 0" / 211 lbs | Nov 4, 1999 (24) | Troy |
| Frankie Bartow WSH | RP | 6' 3" / 180 lbs | Feb 26, 1997 (27) | Miami (FL) |
| Andersson Barvosa TOR | RP | 6' 1" / 198 lbs | Aug 6, 2005 (18) | None |
| Luis Alexander Basabe | CF | 6' 0" / 180 lbs | Aug 26, 1996 (27) | None |
| Osleivis Basabe TB | SS | 5' 11" / 188 lbs | Sep 13, 2000 (23) | None |
| Olivier Basabe | SS | 5' 11" / 190 lbs | Jul 15, 1997 (26) | Faulkner |
| Edgar Basabe TEX | CF | 6' 0" / 155 lbs | Apr 27, 2004 (19) | None |
| Angel Basabe | CF | 6' 0" / 153 lbs | Dec 12, 2000 (23) | None |
| Samuel Basallo BAL | C | 6' 3" / 180 lbs | Aug 13, 2004 (19) | None |
| Andrew Bash TOR | RP | 6' 0" / 190 lbs | Aug 11, 1996 (27) | California Baptist |
| Tyler Bashlor | RP | 6' 0" / 195 lbs | Apr 16, 1993 (31) | South Georgia State |
| Anthony Bass | RP | 6' 2" / 205 lbs | Nov 1, 1987 (36) | Wayne State |
| Blake Bass TEX | RP | 6' 7" / 265 lbs | Jun 3, 1993 (30) | Angelo State |
| Chris Bassitt TOR | SP | 6' 5" / 217 lbs | Feb 22, 1989 (35) | Akron |
| Brady Basso OAK | SP | 6' 2" / 213 lbs | Oct 8, 1997 (26) | Oklahoma State |
| Franrielis Bastardo PIT | 1B | 6' 2" / 195 lbs | Jul 19, 2002 (21) | None |
| Angel Bastardo BOS | SP | 6' 1" / 175 lbs | Jun 18, 2002 (21) | None |
| Abel Bastidas DET | SS | 6' 1" / 165 lbs | Nov 24, 2003 (20) | None |
| Jesus Bastidas HOU | 2B | 5' 10" / 145 lbs | Sep 14, 1998 (25) | None |
| Eliecer Bata PHI | SP | 6' 3" / 190 lbs | Mar 20, 2004 (20) | None |
| Brett Bateman CHC | OF | 5' 10" / 170 lbs | Mar 19, 2002 (22) | Minnesota |
| Nathan Bates | RP | 6' 6" / 205 lbs | Mar 1, 1994 (30) | Georgia State |
| Solomon Bates | RP | 6' 2" / 210 lbs | Mar 16, 1997 (27) | Southern California |
| Parker Bates KC | CF | 5' 11" / 205 lbs | Nov 16, 1997 (26) | Louisiana Tech |
| Freuddy Batista SEA | C | 6' 0" / 182 lbs | Dec 12, 1999 (24) | None |
| Cristian Batista WSH | RF | 6' 1" / 170 lbs | May 2, 2004 (19) | None |
| Juan Batista ARI | OF | 6' 1" / 175 lbs | Jan 9, 2001 (23) | None |
| Reminton Batista MIA | CF | 5' 10" / 175 lbs | Jan 28, 2005 (19) | None |
| Carlos Batista WSH | CF | 6' 1" / 170 lbs | Nov 3, 2005 (18) | None |
| Erick Batista LAD | RP | 6' 0" / 186 lbs | Mar 3, 2004 (20) | None |
| Yadiel Batista STL | SP | 6' 3" / 170 lbs | Apr 17, 2004 (19) | None |
| Aldrin Batista CHW | SP | 6' 2" / 185 lbs | May 4, 2003 (20) | None |
| Domingo Batista TB | SS | 6' 1" / 170 lbs | Feb 8, 2007 (17) | None |
| Ryan Battaglia | C | 6' 1" / 205 lbs | - | - |
| Matthew Batten SD | 2B | 5' 10" / 180 lbs | Jun 22, 1995 (28) | Quinnipiac |
| Blake Battenfield CHW | SP | 6' 3" / 220 lbs | Aug 22, 1994 (29) | Oklahoma State |
| Peyton Battenfield NYM | SP | 6' 4" / 224 lbs | Aug 10, 1997 (26) | Oklahoma State |
| Kyle Battle NYY | LF | 6' 0" / 190 lbs | Dec 4, 1997 (26) | Old Dominion |
| Brett Baty NYM | 3B | 6' 3" / 210 lbs | Nov 13, 1999 (24) | None |
| Trevor Bauer | SP | 6' 1" / 205 lbs | Jan 17, 1991 (33) | UCLA |
| Jake Bauers MIL | 1B | 5' 11" / 213 lbs | Oct 6, 1995 (28) | None |
| Jay Baum | 3B | 6' 0" / 190 lbs | Oct 25, 1992 (31) | Clemson |
| Tyler Baum OAK | SP | 6' 2" / 195 lbs | Jan 14, 1998 (26) | North Carolina |
| Riley Bauman LAA | P | 6' 0" / 181 lbs | Aug 30, 2002 (21) | Abilene Christian |
| Buddy Baumann | RP | 5' 11" / 198 lbs | Dec 9, 1987 (36) | None |
| Mike Baumann BAL | RP | 6' 4" / 240 lbs | Sep 10, 1995 (28) | Jacksonville |
| Garrett Baumann ATL | SP | 6' 8" / 245 lbs | Aug 15, 2004 (19) | None |
| Jackson Baumeister BAL | SP | 6' 4" / 224 lbs | Jul 10, 2002 (21) | Florida State |
| Collin Baumgartner COL | SP | 6' 6" / 250 lbs | Sep 26, 1998 (25) | Kansas |
| Carter Baumler BAL | SP | 6' 2" / 195 lbs | Jan 31, 2002 (22) | None |
| Jose Bautista | RF | 6' 0" / 205 lbs | Oct 19, 1980 (43) | - |
| Rafael Bautista | CF | 6' 2" / 194 lbs | Mar 8, 1993 (31) | None |
| Gerson Bautista | RP | 6' 3" / 195 lbs | May 31, 1995 (28) | None |
| Wendolyn Bautista | RP | 6' 0" / 185 lbs | Mar 27, 1993 (31) | None |
| Roberto Bautista STL | RP | 6' 3" / 168 lbs | Nov 23, 2002 (21) | None |
| Adenys Bautista BOS | P | 6' 3" / 170 lbs | Aug 6, 1998 (25) | None |
| Saul Bautista | CF | 6' 0" / 145 lbs | Apr 20, 2004 (19) | None |
| Luis Bautista TOR | IF | 5' 10" / 150 lbs | Sep 17, 2003 (20) | None |
| Kelvin Bautista LAD | RP | 5' 11" / 155 lbs | Jul 7, 1999 (24) | None |
| Félix Bautista BAL | RP | 6' 8" / 285 lbs | Jun 20, 1995 (28) | None |
| Erick Bautista COL | CF | 6' 2" / 197 lbs | Feb 18, 2005 (19) | None |
| Israfell Bautista TB | 3B | 6' 2" / 155 lbs | Oct 13, 2006 (17) | None |
| Jorge Bautista ATL | P | 6' 0" / 155 lbs | - | None |
| Danny Bautista Jr. OAK | 1B | 6' 2" / 185 lbs | Sep 20, 2000 (23) | None |
| D.J. Baxendale | SP | 6' 2" / 190 lbs | Dec 8, 1990 (33) | Arkansas |
| Jarod Bayless SEA | SP | 6' 4" / 225 lbs | Dec 29, 1996 (27) | Dallas Baptist |
| Jamari Baylor | SS | 5' 11" / 190 lbs | Aug 25, 2000 (23) | None |
| Shane Baz TB | SP | 6' 2" / 190 lbs | Jun 17, 1999 (24) | None |
| Eduard Bazardo SEA | RP | 6' 0" / 190 lbs | Sep 1, 1995 (28) | None |
| Brandon Beachy | P | 6' 2" / 215 lbs | Sep 3, 1986 (37) | Indiana Wesleyan |
| Steve Bean | C | - / 190 lbs | Sep 15, 1993 (30) | - |
| James Beard CHW | CF | 5' 10" / 170 lbs | Sep 24, 2000 (23) | None |
| Jeremy Beasley | SP | 6' 3" / 235 lbs | Nov 20, 1995 (28) | Clemson |
| Pedro Beato | RP | 6' 6" / 230 lbs | Oct 27, 1986 (37) | - |
| Andy Beato TEX | C | 5' 10" / 190 lbs | Nov 27, 2003 (20) | None |
| Matt Beaty | 1B | 6' 0" / 215 lbs | Apr 28, 1993 (30) | Belmont |
| Dylan Beavers BAL | RF | 6' 4" / 205 lbs | Aug 11, 2001 (22) | California |
| Christopher Bec | C | 5' 11" / 190 lbs | Dec 30, 1995 (28) | Maine |
| Octavio Becerra LAD | RP | 6' 3" / 209 lbs | Feb 3, 2001 (23) | None |
| Marty Bechina OAK | 2B | 6' 0" / 200 lbs | Oct 31, 1996 (27) | Michigan State |
| Andrew Bechtold TOR | 3B | 6' 1" / 185 lbs | Apr 18, 1996 (27) | Chipola JC (FL) |
| Chris Beck NYY | RP | 6' 3" / 225 lbs | Sep 4, 1990 (33) | Georgia Southern |
| Preston Beck | 1B | 6' 2" / 190 lbs | Oct 26, 1990 (33) | None |
| Austin Beck LAD | CF | 6' 1" / 200 lbs | Nov 21, 1998 (25) | None |
| Tristan Beck SF | RP | 6' 4" / 165 lbs | Jun 24, 1996 (27) | Stanford |
| Brendan Beck NYY | SP | 6' 2" / 205 lbs | Oct 6, 1998 (25) | Stanford |
| Brendan Beck NYY | P | 6' 2" / 205 lbs | Oct 6, 1998 (25) | Stanford |
| Jordan Beck COL | LF | 6' 3" / 225 lbs | Apr 19, 2001 (22) | Tennessee |
| Jared Beck BAL | RP | 7' 0" / 225 lbs | Jul 1, 2000 (23) | St. Leo (FL) |
| Tyler Beck | RP | 6' 1" / 190 lbs | Nov 16, 1995 (28) | Tampa |
| Brandon Beckel PHI | RP | 6' 4" / 225 lbs | Oct 20, 2001 (22) | Texas Tech |
| Austin Becker COL | RP | 6' 5" / 215 lbs | Sep 2, 1999 (24) | Texas Tech |
| Gordon Beckham | 2B | 6' 0" / 190 lbs | Sep 16, 1986 (37) | Georgia |
| Tim Beckham | SS | 6' 1" / 205 lbs | Jan 27, 1990 (34) | None |
| Cody Beckman | RP | 6' 2" / 205 lbs | Nov 1, 1994 (29) | North Carolina State |
| Ian Bedell STL | RP | 6' 2" / 198 lbs | Sep 5, 1999 (24) | Missouri |
| Brandon Bednar | 3B | 6' 4" / 185 lbs | - | - |
| David Bednar PIT | RP | 6' 0" / 225 lbs | Oct 10, 1994 (29) | Lafayette College |
| Will Bednar SF | SP | 6' 2" / 230 lbs | Jun 13, 2000 (23) | Mississippi State |
| Randy Bednar SEA | LF | 5' 11" / 200 lbs | Nov 30, 1998 (25) | Maryland |
| Cam Bedrosian | RP | 6' 1" / 225 lbs | Oct 2, 1991 (32) | None |
| Tyler Beede CLE | SP | 6' 2" / 216 lbs | May 23, 1993 (30) | Vanderbilt |
| Jalen Beeks COL | RP | 5' 11" / 215 lbs | Jul 10, 1993 (30) | Arkansas |
| Seth Beer PIT | 1B | 6' 0" / 213 lbs | Sep 18, 1996 (27) | Clemson |
| Blake Beers OAK | SP | 6' 4" / 215 lbs | Jul 15, 1998 (25) | Michigan |
| Bradlee Beesley CHC | LF | 5' 10" / 180 lbs | Feb 21, 1998 (26) | Cal Poly San Luis Obispo |
| Clayton Beeter NYY | SP | 6' 2" / 220 lbs | Oct 9, 1998 (25) | Texas Tech |
| Harrison Beethe KC | RP | 6' 5" / 220 lbs | Apr 3, 1998 (26) | Texas Christian |
| Jarrod Belbin SEA | 1B | 6' 2" / 220 lbs | Jun 22, 2000 (23) | Campbell |
| Carlos Belen | 3B | 6' 1" / 250 lbs | Feb 28, 1996 (28) | None |
| Darel Belen | OF | 6' 4" / 204 lbs | May 21, 2000 (23) | None |
| Jeff Belge TB | RP | 6' 5" / 225 lbs | Dec 4, 1997 (26) | St. John's |
| Nigel Belgrave MIA | RP | 6' 4" / 195 lbs | May 12, 2002 (21) | Maryland |
| Josh Bell MIA | 1B | 6' 4" / 261 lbs | Aug 14, 1992 (31) | None |
| Brantley Bell | 2B | 6' 3" / 185 lbs | Nov 16, 1994 (29) | State College of Florida, Manatee-Sarasota |
| Brock Bell CIN | RP | 6' 4" / 227 lbs | Mar 18, 1998 (26) | State College of Florida |
| Chad Bell NYY | 3B | 6' 2" / 210 lbs | Mar 4, 1997 (27) | Louisiana-Monroe |
| Luke Bell CHW | RP | 6' 4" / 205 lbs | Aug 9, 2000 (23) | Xavier |
| Andrew Bellatti PHI | RP | 6' 1" / 190 lbs | Aug 5, 1991 (32) | None |
| John Beller OAK | RP | 5' 11" / 175 lbs | Mar 6, 1999 (25) | Southern California |
| Cody Bellinger CHC | CF | 6' 4" / 203 lbs | Jul 13, 1995 (28) | None |
| Micah Bello | RF | 5' 11" / 165 lbs | Jul 21, 2000 (23) | None |
| Brayan Bello BOS | SP | 6' 1" / 195 lbs | May 17, 1999 (24) | None |
| Erick Bello | RP | 5' 11" / 170 lbs | Aug 18, 2002 (21) | None |
| Adrian Bello MIA | C | 5' 11" / 165 lbs | May 19, 2006 (17) | None |
| Jose Bello SF | SP | 6' 1" / 164 lbs | May 29, 2005 (18) | None |
| Bear Bellomy | RP | 6' 4" / 205 lbs | Nov 29, 1996 (27) | Wright State |
| Valente Bellozo MIA | SP | 5' 10" / 208 lbs | Jan 4, 2000 (24) | None |
| Brandon Belt | 1B | 6' 3" / 230 lbs | Apr 20, 1988 (35) | Texas |
| Carlos Beltran | DH | 6' 1" / 213 lbs | Apr 24, 1977 (46) | - |
| Hugo Beltran BAL | RP | 6' 1" / 190 lbs | Jun 13, 2000 (23) | None |
| Luis Beltran BAL | RP | 6' 4" / 175 lbs | Apr 6, 2004 (20) | None |
| Luis Beltran BAL | RP | 6' 4" / 175 lbs | - | None |
| Nelson Beltran OAK | SS | 5' 10" / 160 lbs | Dec 28, 2001 (22) | None |
| Angel Beltran ARI | P | 6' 4" / 230 lbs | Jul 13, 2007 (16) | None |
| Nolan Beltran PHI | SS | 6' 0" / 160 lbs | Jan 24, 2005 (19) | None |
| Adrian Beltre | 3B | 5' 11" / 220 lbs | Apr 7, 1979 (45) | - |
| Michael Beltre | RF | 6' 3" / 220 lbs | Jul 3, 1995 (28) | None |
| Manuel Beltre TOR | SS | 5' 9" / 155 lbs | Jun 9, 2004 (19) | None |
| Eddy Beltre SD | RF | 5' 11" / 165 lbs | Apr 16, 2004 (20) | None |
| Eduardo Beltre MIN | OF | 5' 11" / 175 lbs | Oct 10, 2006 (17) | None |
| Anthony Bemboom DET | C | 6' 2" / 195 lbs | Jan 18, 1990 (34) | Creighton |
| Cristobal Bena PHI | SS | 5' 10" / 133 lbs | Sep 17, 2006 (17) | None |
| Cristian Benavides BAL | SS | 6' 0" / 155 lbs | May 11, 2005 (18) | None |
| Justin Bench SF | 3B | 6' 0" / 185 lbs | Aug 28, 1999 (24) | Mississippi |
| Edwuin Bencomo | P | 6' 2" / 205 lbs | Apr 14, 1999 (25) | None |
| Frederick Bencosme BAL | SS | 6' 0" / 160 lbs | Dec 25, 2002 (21) | None |
| John Bencosme MIL | SS | 5' 9" / 172 lbs | Feb 1, 2006 (18) | None |
| Anthony Bender MIA | RP | 6' 4" / 205 lbs | Feb 3, 1995 (29) | Santa Rosa JC (CA) |
| Colton Bender SD | C | 5' 9" / 195 lbs | Jan 13, 1999 (25) | Quinnipiac |
| Carmen Benedetti HOU | RF | 6' 2" / 215 lbs | Oct 29, 1994 (29) | Michigan |
| Spencer Bengard MIN | SP | 6' 4" / 220 lbs | Apr 19, 2002 (21) | California Baptist |
| Andrew Benintendi CHW | LF | 5' 9" / 180 lbs | Jul 6, 1994 (29) | Arkansas |
| Jaycey Benita NYM | LF | 6' 1" / 157 lbs | Dec 30, 2002 (21) | None |
| Angel Benitez NYY | SP | 6' 7" / 204 lbs | Sep 10, 2003 (20) | None |
| Diego Benitez ATL | SS | 6' 1" / 180 lbs | Nov 19, 2004 (19) | None |
| Lazaro Benitez DET | CF | 5' 9" / 190 lbs | Oct 15, 1999 (24) | None |
| Keyner Benitez MIA | SP | 6' 1" / 165 lbs | May 23, 2006 (17) | None |
| Jorge Benitez BOS | RP | 6' 2" / 155 lbs | Jun 2, 1999 (24) | None |
| Wes Benjamin | SP | 6' 2" / 210 lbs | Jul 26, 1993 (30) | Kansas |
| Juan Benjamin CLE | SS | 5' 8" / 150 lbs | Apr 25, 2003 (20) | None |
| Nick Bennett MIL | SP | 6' 4" / 210 lbs | Sep 1, 1997 (26) | Louisville |
| Jake Bennett WSH | SP | 6' 6" / 234 lbs | Dec 2, 2000 (23) | Oklahoma |
| Godwin Bennett CHW | OF | 6' 2" / 170 lbs | Oct 4, 2002 (21) | None |
| Pierce Bennett PHI | 2B | 6' 1" / 200 lbs | Jun 28, 2001 (22) | Wake Forrest |
| Rodrigo Benoit | P | - / - | - | None |
| Donovan Benoit CIN | RP | 6' 3" / 203 lbs | Jan 22, 1999 (25) | Tulane |
| Sam Benschoter CIN | SP | 6' 3" / 215 lbs | Mar 17, 1998 (26) | Michigan State |
| Will Benson CIN | LF | 6' 5" / 230 lbs | Jun 16, 1998 (25) | None |
| Griffin Benson | 1B | 6' 5" / 210 lbs | Sep 28, 1997 (26) | None |
| Cooper Benson TOR | SP | 6' 0" / 213 lbs | Aug 3, 2000 (23) | Arizona State |
| Denny Bentley MIN | P | 6' 2" / 195 lbs | May 28, 1998 (25) | Howard JC (TX) |
| Trey Benton CLE | P | 6' 4" / 215 lbs | Jun 18, 1998 (25) | East Carolina |
| Alexander Benua ARI | SS | 6' 2" / 158 lbs | Oct 19, 2003 (20) | None |
| Alfredo Benzan ARI | SS | 6' 2" / 165 lbs | Apr 21, 2007 (16) | None |
| Jesse Berardi | SS | 5' 9" / 185 lbs | Jan 13, 1996 (28) | St. John's |
| Jairo Beras | RP | 6' 6" / 195 lbs | Dec 25, 1994 (29) | None |
| Cesar Berbesi | SS | 6' 0" / 160 lbs | Apr 13, 2022 (2) | None |
| Travis Bergen | RP | 6' 1" / 205 lbs | Oct 8, 1993 (30) | Kennesaw State |
| Ryan Bergert SD | SP | 6' 1" / 210 lbs | Mar 8, 2000 (24) | West Virginia |
| Michael Berglund CLE | C | 6' 2" / 195 lbs | Jul 18, 1997 (26) | Cisco JC (TX) |
| Austin Bergner DET | SP | 6' 5" / 210 lbs | May 1, 1997 (26) | North Carolina |
| William Bergolla PHI | SS | 5' 11" / 165 lbs | Oct 20, 2004 (19) | None |
| Victor Bericoto SF | RF | 6' 1" / 155 lbs | Dec 3, 2001 (22) | None |
| Stevie Berman TOR | C | 6' 2" / 225 lbs | Nov 28, 1994 (29) | Santa Clara |
| Jose Bermudez | RF | 6' 2" / 160 lbs | Jul 9, 1997 (26) | None |
| Jonathan Bermudez MIA | SP | 6' 2" / 237 lbs | Oct 16, 1995 (28) | None |
| Luis Bermudez SF | SP | 6' 0" / 165 lbs | Jun 10, 2004 (19) | None |
| Warming Bernabel COL | SS | 6' 1" / 180 lbs | Jun 6, 2002 (21) | None |
| Warming Bernabel COL | SS | 6' 0" / 180 lbs | Jun 6, 2002 (21) | None |
| Leonardo Bernal STL | C | 6' 0" / 200 lbs | Feb 13, 2004 (20) | None |
| Jonatan Bernal KC | SP | 6' 1" / 194 lbs | Jun 29, 2002 (21) | None |
| Wynton Bernard CHW | CF | 6' 2" / 200 lbs | Sep 24, 1990 (33) | Niagara |
| Austin Bernard | C | 5' 10" / 195 lbs | Mar 14, 1996 (28) | Pepperdine |
| Brennan Bernardino BOS | RP | 6' 4" / 180 lbs | Jan 15, 1992 (32) | Cal State Dominguez Hills |
| Smeily Bernardo LAD | P | 6' 2" / 180 lbs | Oct 22, 2001 (22) | None |
| Mason Berne ARI | 1B | 6' 3" / 225 lbs | Mar 11, 1996 (28) | North Carolina Wilmington |
| José Berríos TOR | SP | 6' 0" / 205 lbs | May 27, 1994 (29) | None |
| Prelander Berroa CHW | SP | 5' 11" / 215 lbs | Apr 18, 2000 (23) | None |
| Jose Berroa | CF | 6' 0" / 165 lbs | Sep 8, 2001 (22) | None |
| Steward Berroa TOR | CF | 5' 10" / 178 lbs | Jun 5, 1999 (24) | None |
| Jacob Berry MIA | 3B | 6' 0" / 212 lbs | May 5, 2001 (22) | Louisiana State |
| Jake Berry CLE | RP | 6' 10" / 235 lbs | May 29, 2001 (22) | None |
| Luke Berryhill HOU | C | 6' 0" / 227 lbs | May 28, 1998 (25) | South Carolina |
| Gabriel Bersing | C | 6' 1" / 195 lbs | Oct 17, 2002 (21) | None |
| Jon Berti NYY | SS | 5' 10" / 190 lbs | Jan 22, 1990 (34) | Bowling Green State |
| John Michael Bertrand SF | SP | 6' 3" / 205 lbs | Feb 8, 1998 (26) | Notre Dame |
| Jay Beshears SD | 2B | 6' 4" / 215 lbs | May 6, 2002 (21) | Duke |
| Cuba Bess | 1B | 6' 2" / 215 lbs | Sep 29, 1997 (26) | Grand Canyon |
| Dellin Betances | RP | 6' 8" / 265 lbs | Mar 23, 1988 (36) | None |
| Jose Betances | RP | 6' 0" / 170 lbs | Oct 17, 1999 (24) | None |
| Jhostin Betances LAA | P | 6' 3" / 147 lbs | Mar 1, 2007 (17) | None |
| Eiver Betancourt LAA | C | 5' 11" / 185 lbs | Oct 2, 2003 (20) | None |
| Kenneth Betancourt | 2B | 5' 8" / 160 lbs | Feb 5, 2000 (24) | None |
| Carlos Betancourt HOU | P | 6' 1" / 160 lbs | Mar 27, 2001 (23) | None |
| Wilson Betemit Jr. KC | RP | 6' 1" / 170 lbs | Jul 27, 2003 (20) | None |
| Christian Bethancourt MIA | C | 6' 3" / 205 lbs | Sep 2, 1991 (32) | None |
| Jhonny Bethencourt | SS | - / - | Feb 12, 1997 (27) | None |
| Trevor Bettencourt | RP | 6' 0" / 195 lbs | Jul 21, 1994 (29) | None |
| Alec Bettinger | SP | 6' 2" / 210 lbs | Jul 13, 1995 (28) | Virginia |
| Chad Bettis | RP | 6' 0" / 201 lbs | Apr 26, 1989 (34) | Texas Tech |
| Mookie Betts LAD | SS | 5' 9" / 180 lbs | Oct 7, 1992 (31) | None |
| Chris Betts | C | 6' 2" / 215 lbs | Mar 10, 1997 (27) | None |
| Ben Beutel CHW | RP | 6' 0" / 165 lbs | Sep 2, 1999 (24) | Iowa |
| Joe Biagini | RP | 6' 5" / 235 lbs | May 29, 1990 (33) | UC Davis |
| Tanner Bibee CLE | SP | 6' 2" / 205 lbs | Mar 5, 1999 (25) | Cal State Fullerton |
| Austin Bibens-Dirkx | RP | 6' 1" / 210 lbs | Apr 29, 1985 (38) | Portland |
| Dylan Bice | RP | 6' 4" / 220 lbs | Aug 17, 1997 (26) | None |
| Bo Bichette TOR | SS | 6' 0" / 190 lbs | Mar 5, 1998 (26) | None |
| Phil Bickford NYY | RP | 6' 4" / 200 lbs | Jul 10, 1995 (28) | CC of Southern Nevada |
| Jesse Biddle | RP | 6' 5" / 220 lbs | Oct 22, 1991 (32) | None |
| Jared Biddy | RP | 6' 2" / 180 lbs | Jul 25, 1996 (27) | Southeastern Louisiana |
| Osvaldo Bido OAK | SP | 6' 3" / 175 lbs | Oct 18, 1995 (28) | None |
| Shane Bieber CLE | SP | 6' 3" / 200 lbs | May 31, 1995 (28) | UC Santa Barbara |
| Brandon Bielak HOU | SP | 6' 2" / 221 lbs | Apr 2, 1996 (28) | Notre Dame |
| Michael Bienlien DET | RP | 6' 3" / 246 lbs | Mar 19, 1998 (26) | North Carolina State |
| Gabe Bierman MIA | SP | 6' 2" / 200 lbs | Sep 3, 1999 (24) | Indiana |
| Daniel Bies NYY | RP | 6' 9" / 245 lbs | Apr 9, 1996 (28) | Gonzaga |
| Justice Bigbie DET | 1B | 6' 2" / 200 lbs | Jan 24, 1999 (25) | Western Carolina |
| Hunter Bigge CHC | RP | 6' 1" / 205 lbs | Jun 12, 1998 (25) | Harvard |
| Jax Biggers TEX | SS | 5' 11" / 175 lbs | Apr 7, 1997 (27) | Arkansas |
| Cavan Biggio TOR | 2B | 6' 2" / 200 lbs | Apr 11, 1995 (29) | Notre Dame |
| Cole Billingsley | RF | - / - | May 29, 1994 (29) | None |
| Jason Bilous CLE | SP | 6' 2" / 185 lbs | Aug 11, 1997 (26) | Coastal Carolina |
| Alex Binelas BOS | 3B | 6' 3" / 225 lbs | May 26, 2000 (23) | Louisville |
| Carter Bins PIT | C | 6' 0" / 215 lbs | Oct 7, 1998 (25) | Fresno State |
| Ryan Birchard MIL | SP | 6' 0" / 207 lbs | Jul 12, 2003 (20) | Niagra County CC |
| Greg Bird | 1B | 6' 4" / 220 lbs | Nov 9, 1992 (31) | None |
| Corey Bird | CF | 6' 1" / 185 lbs | Aug 11, 1995 (28) | Marshall |
| Kyle Bird | RP | 6' 2" / 175 lbs | Apr 12, 1993 (31) | Flagler (FL) |
| Jake Bird COL | RP | 6' 3" / 200 lbs | Dec 4, 1995 (28) | UCLA |
| Brandon Birdsell CHC | SP | 6' 2" / 240 lbs | Mar 23, 2000 (24) | Texas Tech |
| Elijah Birdsong PIT | RP | 6' 2" / 200 lbs | Oct 11, 1999 (24) | Pacific |
| Hayden Birdsong SF | RP | 6' 4" / 215 lbs | Aug 30, 2001 (22) | Eastern Illinois |
| Reid Birlingmair TEX | RP | 5' 10" / 210 lbs | Nov 13, 1996 (27) | Illinois |
| Kyle Bischoff MIN | RP | 6' 2" / 210 lbs | Jul 29, 1999 (24) | MIchigan State |
| Braden Bishop | CF | 6' 1" / 190 lbs | Aug 22, 1993 (30) | Washington |
| Cameron Bishop BAL | P | 6' 4" / 215 lbs | Feb 14, 1996 (28) | UC Irvine |
| Hunter Bishop SF | CF | 6' 5" / 210 lbs | Jun 25, 1998 (25) | Arizona State |
| Braylon Bishop PIT | CF | 6' 2" / 193 lbs | Apr 23, 2003 (20) | None |
| Joshua Bissonette PIT | SS | 6' 0" / 185 lbs | Nov 1, 1996 (27) | Baylor |
| Eric Bitonti MIL | 3B | 6' 4" / 218 lbs | Nov 17, 2005 (18) | None |
| Nick Bitsko TB | SP | 6' 4" / 225 lbs | Jun 16, 2002 (21) | None |
| Spencer Bivens SF | RP | 6' 5" / 205 lbs | Jun 28, 1994 (29) | None |
| Ty Blach COL | SP | 6' 1" / 215 lbs | Oct 20, 1990 (33) | Creighton |
| Ray Black MIL | RP | 6' 3" / 230 lbs | Jun 26, 1990 (33) | Pittsburgh |
| Grant Black | RP | 6' 5" / 225 lbs | Jul 21, 1994 (29) | Arkansas-Monticello |
| Tyler Black MIL | 2B | 5' 10" / 190 lbs | Jul 26, 2000 (23) | Wright State |
| Mason Black SF | SP | 6' 3" / 230 lbs | Dec 10, 1999 (24) | Lehigh |
| Paul Blackburn OAK | SP | 6' 1" / 196 lbs | Dec 4, 1993 (30) | None |
| Matt Blackham | RP | 5' 10" / 150 lbs | Jan 7, 1993 (31) | Middle Tennessee State |
| Charlie Blackmon COL | DH | 6' 3" / 221 lbs | Jul 1, 1986 (37) | Georgia Tech |
| JoJo Blackmon TEX | CF | 6' 0" / 183 lbs | Mar 31, 2003 (21) | None |
| Benjamin Blackwell TEX | SS | 5' 11" / 190 lbs | Apr 6, 1999 (25) | Clemson |
| Nolan Blackwood MIL | RP | 6' 5" / 185 lbs | Mar 16, 1995 (29) | Memphis |
| Aaron Blair | SP | 6' 4" / 220 lbs | May 26, 1992 (31) | Marshall |
| Seth Blair | RP | 6' 2" / 185 lbs | Mar 3, 1989 (35) | Arizona State |
| Daniel Blair SF | RP | 6' 3" / 205 lbs | Apr 8, 1999 (25) | Texas |
| Andy Blake LAA | SS | 6' 4" / 200 lbs | Aug 15, 2000 (23) | Columbia |
| Werner Blakely LAA | SS | 6' 3" / 185 lbs | Feb 21, 2002 (22) | None |
| Bradley Blalock MIL | SP | 6' 2" / 213 lbs | Dec 25, 2000 (23) | None |
| Wilmer Blanca TOR | OF | 5' 11" / 178 lbs | Jan 17, 2007 (17) | None |
| Jason Blanchard SD | RP | 6' 0" / 185 lbs | Jun 25, 1997 (26) | Lamar |
| Gregor Blanco | LF | 5' 11" / 175 lbs | Dec 24, 1983 (40) | - |
| Andrés Blanco | 3B | 5' 10" / 192 lbs | Apr 11, 1984 (40) | None |
| Dairon Blanco KC | LF | 5' 11" / 200 lbs | Apr 26, 1993 (30) | None |
| Ronel Blanco HOU | SP | 6' 3" / 265 lbs | Aug 31, 1993 (30) | None |
| Miguel Blanco SF | OF | 6' 0" / 155 lbs | Oct 26, 2005 (18) | None |
| Tony Blanco Jr. PIT | RF | 6' 6" / 243 lbs | May 14, 2005 (18) | None |
| Alex Blandino CIN | 2B | 6' 0" / 190 lbs | Nov 6, 1992 (31) | Stanford |
| Travis Blankenhorn WSH | 2B | 6' 0" / 238 lbs | Aug 3, 1996 (27) | None |
| Alejandro Blasco CLE | 2B | 5' 7" / 154 lbs | Mar 29, 2007 (17) | None |
| Jabari Blash | RF | 6' 4" / 195 lbs | Jul 4, 1989 (34) | None |
| Michael Blazek | RP | 6' 0" / 207 lbs | Mar 16, 1989 (35) | - |
| JJ Bleday OAK | CF | 6' 1" / 205 lbs | Nov 10, 1997 (26) | Vanderbilt |
| Richard Bleier WSH | RP | 6' 3" / 234 lbs | Apr 16, 1987 (37) | Florida Gulf Coast |
| Miguel Bleis BOS | CF | 6' 3" / 170 lbs | Mar 1, 2004 (20) | None |
| Jerry Blevins | RP | 6' 6" / 190 lbs | Sep 6, 1983 (40) | Dayton |
| Scott Blewett MIN | RP | 6' 6" / 210 lbs | Apr 10, 1996 (28) | None |
| Ryan Bliss SEA | SS | 5' 9" / 165 lbs | Dec 13, 1999 (24) | Auburn |
| A.J. Block KC | SP | 6' 5" / 218 lbs | Apr 16, 1998 (26) | Washington State |
| Jack Blomgren COL | SS | 5' 10" / 180 lbs | Sep 27, 1998 (25) | Michigan |
| Jake Bloss HOU | P | 6' 3" / 205 lbs | Jun 23, 2001 (22) | Georgetown |
| Taylor Bloye KC | RP | 6' 2" / 194 lbs | Feb 28, 1995 (29) | Covenant |
| A.J. Blubaugh HOU | RP | 6' 2" / 190 lbs | Jul 4, 2000 (23) | Wisconsin-Milwaukee |
| Dennis Boatman CIN | RP | 6' 5" / 225 lbs | Nov 20, 1999 (24) | UCLA |
| Scott Boches | RP | 6' 5" / 205 lbs | Oct 17, 1994 (29) | Marist |
| Brett Bochy | RP | 6' 2" / 200 lbs | Aug 27, 1987 (36) | Kansas |
| Jake Bockenstedt CHW | RP | 6' 1" / 190 lbs | Nov 15, 1999 (24) | Southern Illinois |
| Mike Boeve MIL | 3B | 6' 2" / 210 lbs | May 5, 2002 (21) | Nebraska-Omaha |
| Xander Bogaerts SD | 2B | 6' 2" / 218 lbs | Oct 1, 1992 (31) | None |
| Cody Bohanek | SS | 6' 1" / 195 lbs | Jul 2, 1995 (28) | Illinois |
| Alec Bohm PHI | 3B | 6' 5" / 218 lbs | Aug 3, 1996 (27) | Wichita State |
| Alfredo Bohorquez HOU | 2B | 5' 9" / 190 lbs | Sep 16, 1990 (33) | St Catherine College |
| Jace Bohrofen TOR | RF | 6' 2" / 205 lbs | Oct 19, 2001 (22) | Arkansas |
| Branden Boissiere WSH | 1B | 6' 1" / 205 lbs | Mar 23, 2000 (24) | Arizona |
| Ulrich Bojarski | RF | 6' 3" / 200 lbs | Sep 15, 1998 (25) | None |
| Gerardo Bojorquez HOU | P | 6' 3" / 195 lbs | Oct 23, 1997 (26) | None |
| Ronald Bolaños | SP | 6' 3" / 220 lbs | Aug 23, 1996 (27) | None |
| Caleb Bolden BOS | RP | 6' 2" / 190 lbs | Dec 19, 1998 (25) | Texas Christian |
| Ryan Boldt | CF | 6' 2" / 210 lbs | Nov 22, 1994 (29) | Nebraska-Lincoln |
| Javier Bolivar | SS | 6' 2" / 170 lbs | Dec 19, 2002 (21) | None |
| Luis Bolivar SEA | LF | 6' 1" / 160 lbs | Feb 9, 2004 (20) | None |
| Mason Bolivar CLE | OF | 5' 10" / 162 lbs | Aug 18, 2006 (17) | None |
| Eduar Bolivar LAA | C | 5' 11" / 180 lbs | Mar 22, 2006 (18) | None |
| Moises Bolivar BOS | SS | 6' 0" / 175 lbs | Jul 8, 2007 (16) | None |
| Skye Bolt ATL | CF | 6' 2" / 194 lbs | Jan 15, 1994 (30) | North Carolina |
| Henry Bolte OAK | CF | 6' 3" / 195 lbs | Aug 4, 2003 (20) | None |
| Cody Bolton SEA | SP | 6' 2" / 210 lbs | Jun 19, 1998 (25) | None |
| Brainer Bonaci BOS | SS | 5' 10" / 164 lbs | Jul 9, 2022 (1) | None |
| Yander Bonaci BOS | P | 5' 11" / 162 lbs | Oct 25, 2006 (17) | None |
| Bo Bonds TOR | RP | 5' 11" / 200 lbs | Jan 10, 2001 (23) | Louisiana-Lafayette |
| Rodolfo Bone | C | 5' 11" / 170 lbs | Mar 22, 2000 (24) | None |
| Emilio Bonifácio | LF | 5' 10" / 200 lbs | Apr 23, 1985 (38) | None |
| Jorge Bonifacio | OF | 6' 1" / 220 lbs | Jun 4, 1993 (30) | None |
| Jose Bonilla LAA | SS | 6' 0" / 185 lbs | Apr 2, 2002 (22) | None |
| Peter Bonilla LAD | RP | 6' 3" / 195 lbs | Dec 16, 2004 (19) | None |
| Enmanuel Bonilla TOR | OF | 6' 1" / 180 lbs | Jan 22, 2006 (18) | None |
| Bryan Bonnell | RP | 6' 5" / 240 lbs | Sep 28, 1993 (30) | Nevada-Las Vegas |
| Bryce Bonnin CIN | SP | 6' 2" / 190 lbs | Oct 11, 1998 (25) | Texas Tech |
| Paul Bonzagni TEX | RP | 6' 3" / 180 lbs | Apr 1, 2002 (22) | Southern Illinois |
| Joel Booker | CF | 6' 1" / 190 lbs | Nov 1, 1993 (30) | Iowa |
| Aaron Boone | 1B | - / - | Mar 9, 1973 (51) | USC |
| Trevor Boone COL | CF | 6' 2" / 210 lbs | Sep 9, 1997 (26) | Oklahoma State |
| Rodney Boone CLE | SP | 6' 1" / 195 lbs | Apr 9, 2000 (24) | UC Santa Barbara |
| Jake Boone | 2B | 6' 0" / 185 lbs | Mar 23, 1999 (25) | Princeton |
| Cam Booser BOS | RP | 6' 3" / 225 lbs | May 4, 1992 (31) | Central Arizona College |
| Tim Borden II HOU | SS | 6' 2" / 200 lbs | Sep 1, 1999 (24) | Georgia Tech |
| Zach Borenstein | LF | 6' 0" / 225 lbs | - | - |
| Dario Borrero CHW | 1B | 6' 5" / 190 lbs | Nov 13, 2003 (20) | None |
| Josh Bortka PHI | RP | 6' 5" / 225 lbs | Jul 12, 1999 (24) | Central Missouri |
| Ryan Borucki PIT | RP | 6' 4" / 210 lbs | Mar 31, 1994 (30) | None |
