Miami Marlins vs. Houston Astros Prediction July 21

The Miami Marlins vs. Houston Astros prediction on Polymarket strongly favors the Over 2.5 runs in the first five innings, with the YES outcome at a dominant 80 percent. The YES side surged 22 percent in the last 24 hours, and the story behind that move starts with Houston’s mound. Ronel Blanco makes his 2026 MLB debut tonight, returning from Tommy John surgery after sitting out since May 2025.

The Over 2.5 market at Polymarket prices the YES outcome at 80 percent and the NO outcome at 20 percent. The momentum composite is cautiously bullish: the price slipped slightly in the last hour but climbed sharply over the previous 24 hours, and the trend score of 31.73 signals cooling after a significant run-up. The game is at Daikin Park in Houston on July 21, 2026, with market resolution set for July 29. Total volume stands at $76,490, nearly all arriving in the last 24 hours.

Game Stats

• Players
• Team

Batters	AVG	HR	RBI	H
O.Lopez SS	0.335	9	46	130
X.Edwards 2B	0.299	6	37	109
J.Marsee CF	0.196	5	25	65
L.Hicks C	0.286	13	58	88
K.Stowers LF	0.229	12	42	64
J.Sanoja 3B	0.268	3	34	64
O.Caissie RF	0.239	12	50	52
H.Hernández LF	0.237	13	36	51
C.Norby 1B	0.205	4	16	41
J.Mack C	0.239	7	24	39
L.Jiménez 3B	0.209	2	9	24
A.Ramírez C	0.230	2	14	26
E.Ruiz RF	0.248	5	10	25
G.Pauley 3B	0.176	1	11	16
G.Conine LF	0.276	7	16	24
C.Morel 1B	0.162	0	1	11
R.Hinds RF	0.114	0	5	4
B.Navarreto C	0.182	0	0	2
D.De Los Santos 1B	0.286	0	0	2

Starting pitcher	W-L	ERA	WHIP	K
T.Phillips SP	2-4	3.48	1.39	56

Pitchers	W-L	ERA	WHIP	K
S.Alcantara SP	10-5	3.89	1.22	107
M.Meyer SP	9-1	2.68	1.14	121
E.Pérez SP	5-7	3.54	1.11	104
T.Phillips SP	2-4	3.48	1.39	56
J.Junk SP	4-5	4.57	1.31	48
L.Bachar RP	1-1	3.53	1.10	57
M.Petersen RP	1-1	2.91	0.99	51
C.Faucher RP	4-5	5.01	1.62	41
J.King RP	6-2	2.48	0.75	30
A.Bender RP	1-1	2.62	0.96	41
P.Fairbanks RP	3-4	7.42	1.52	41
R.Gusto SP	0-2	5.02	1.47	25
C.Gibson RP	2-0	4.91	1.36	24
A.Nardi RP	3-3	5.16	1.41	27
T.Zuber RP	0-0	3.46	1.39	14
W.Kempner RP	1-0	2.92	0.97	14
D.Fulton SP	0-0	2.57	0.86	6
J.Ekness RP	0-0	1.69	1.31	5
R.Snelling SP	0-1	5.40	1.80	2
B.Garrett SP	0-1	14.54	3.46	5
J.Sanoja 3B	0-0	6.00	1.33	1
Z.Brzykcy RP	0-0	4.50	1.50	2
J.White RP	0-0	67.50	7.50	1
B.Navarreto C	0-0	0.00	0.00	0
E.Ruiz RF	0-0	0.00	0.00	0
L.Jiménez 3B	0-0	0.00	0.00	0
G.Conine LF	0-0	0.00	0.00	0
X.Edwards 2B	0-0	0.00	0.00	0
O.Lopez SS	0-0	0.00	0.00	0
H.Hernández LF	0-0	0.00	0.00	0
R.Hinds RF	0-0	0.00	0.00	0
K.Stowers LF	0-0	0.00	0.00	0
A.Ramírez C	0-0	0.00	0.00	0
C.Morel 1B	0-0	0.00	0.00	0
O.Caissie RF	0-0	0.00	0.00	0
J.Mack C	0-0	0.00	0.00	0
C.Norby 1B	0-0	0.00	0.00	0
L.Hicks C	0-0	0.00	0.00	0
D.De Los Santos 1B	0-0	0.00	0.00	0
J.Marsee CF	0-0	0.00	0.00	0
G.Pauley 3B	0-0	0.00	0.00	0

INJURY REPORT

NAME	POS	STATUS	INJURY	NOTES
Anthony Bender	POS RP	STATUS Out	INJURY Shin	Notes Bender is dealing with a right shin stress reaction and has been placed on the 15-day injured list.
Janson Junk	POS SP	STATUS Out	INJURY Shin	Notes Junk is dealing with right shin inflammation and been placed on the 15-day injured list. He is expected to return in mid-July.
Robby Snelling	POS SP	STATUS Out	INJURY Elbow	Notes Snelling is set to undergo Tommy John surgery and has been placed on the 60-day injured list. He will miss the remainder of the 2026 season.
Andrew Nardi	POS RP	STATUS Out	INJURY Rib	Notes Nardi is dealing with a stress reaction in his right rib cage and has been placed on the 60-day injured list. He is expected to return in early September.
Josh Ekness	POS RP	STATUS Out	INJURY Calf	Notes Ekness is dealing with a calf strain and has been placed on the 60-day injured list. He is expected to return in mid-July.

full roster and injuries

Batters	AVG	HR	RBI	H
C.Walker 1B	0.234	20	58	85
Y.Alvarez DH	0.319	31	73	115
I.Paredes 3B	0.257	12	50	88
C.Smith RF	0.210	12	34	70
J.Altuve 2B	0.235	12	28	70
B.Matthews CF	0.197	7	22	41
J.Peña SS	0.295	6	22	59
C.Vázquez C	0.217	5	22	38
Y.Diaz C	0.241	6	23	42
J.Meyers CF	0.206	3	11	28
C.Correa SS	0.279	3	16	34
T.Trammell CF	0.228	3	11	26
J.Loperfido LF	0.216	1	12	22
N.Allen SS	0.239	1	10	22
Z.Dezenzo LF	0.238	1	3	15
Z.Cole LF	0.157	3	8	8
D.Harris LF	0.233	0	5	10
L.Wade Jr. LF	0.205	2	8	8
R.Delgado 2B	0.273	1	4	9
S.Whitcomb 3B	0.130	2	5	3
C.Salazar C	0.056	0	1	1
D.Johnson CF	0.143	0	0	2
C.Price C	0.167	0	0	2
L.Spence CF	0.273	0	0	3

Starting pitcher	W-L	ERA	WHIP	K
T.Imai SP	5-4	6.06	1.50	63

Pitchers	W-L	ERA	WHIP	K
M.Burrows SP	4-9	5.99	1.55	75
P.Lambert SP	8-5	3.03	1.11	91
S.Arrighetti SP	7-5	4.35	1.31	87
K.Teng SP	4-6	4.21	1.34	66
A.Blubaugh RP	4-2	3.63	1.26	63
T.Imai SP	5-4	6.06	1.50	63
S.Okert RP	2-1	2.22	0.82	50
E.De Los Santos RP	0-3	4.34	1.18	42
B.King RP	2-3	3.40	1.31	35
H.Brown SP	1-1	4.05	1.45	43
B.Abreu RP	2-3	5.63	1.63	40
R.Weiss RP	0-3	7.62	2.12	30
N.Pearson RP	1-0	3.60	1.40	16
C.Bolton RP	0-1	5.40	1.75	22
J.Alexander SP	1-1	9.33	1.58	14
J.Hader RP	3-1	1.10	0.86	28
C.Javier SP	0-1	9.37	2.20	14
A.Santa RP	0-1	1.17	0.91	9
C.Gordon SP	0-0	11.57	2.57	11
C.Roa SP	0-1	5.19	1.96	6
J.France SP	0-0	8.10	1.65	4
L.VanWey RP	1-0	1.50	0.83	5
M.Ullola SP	0-0	0.00	0.50	7
R.Muñoz SP	0-0	15.75	3.25	6
B.Sousa RP	0-0	8.10	2.40	4
J.Meyers CF	0-0	0.00	0.00	0
C.Salazar C	0-0	9.00	1.00	0
C.Vázquez C	0-0	0.00	0.00	0
J.Altuve 2B	0-0	0.00	0.00	0
C.Correa SS	0-0	0.00	0.00	0
C.Walker 1B	0-0	0.00	0.00	0
L.Wade Jr. LF	0-0	0.00	0.00	0
T.Trammell CF	0-0	0.00	0.00	0
Y.Alvarez DH	0-0	0.00	0.00	0
I.Paredes 3B	0-0	0.00	0.00	0
D.Johnson CF	0-0	0.00	0.00	0
N.Allen SS	0-0	0.00	0.00	0
J.Peña SS	0-0	0.00	0.00	0
R.Delgado 2B	0-0	0.00	0.00	0
D.Harris LF	0-0	0.00	0.00	0
S.Whitcomb 3B	0-0	0.00	0.00	0
Y.Diaz C	0-0	0.00	0.00	0
J.Loperfido LF	0-0	0.00	0.00	0
C.Price C	0-0	0.00	0.00	0
Z.Cole LF	0-0	0.00	0.00	0
Z.Dezenzo LF	0-0	0.00	0.00	0
B.Matthews CF	0-0	0.00	0.00	0
L.Spence CF	0-0	0.00	0.00	0
C.Smith RF	0-0	0.00	0.00	0

INJURY REPORT

NAME	POS	STATUS	INJURY	NOTES
Carlos Correa	POS SS	STATUS Out	INJURY Ankle	Notes Correa is set to undergo surgery on his left ankle and has been placed on the 60-day injured list. He is expected to miss the remainder of the 2026 season.
Christian Walker	POS 1B	STATUS Questionable	INJURY Back	Notes Walker is dealing with stiffness in his lower back and is uncertain to take the field for the Astros.
LaMonte Wade Jr.	POS 1B	STATUS Out	INJURY Hamstring	Notes Wade Jr. is dealing with a right hamstring strain and has been placed on the 10-day injured list. He is expected to return in late June.
Cristian Javier	POS SP	STATUS Out	INJURY Shoulder	Notes Javier is dealing with a right shoulder strain and has been placed on the 60-day injured list. He is expected to return in late June.
Kai-Wei Teng	POS SP	STATUS Out	INJURY Knee	Notes Teng is dealing with a right knee sprain and has been placed on the 15-day injured list.
Jeremy Peña	POS SS	STATUS Out	INJURY Leg	Notes Peña is dealing with left leg discomfort and has been placed on the 10-day injured list.
Raynel Delgado	POS 2B	STATUS Questionable	INJURY Finger	Notes Delgado is dealing with a dislocated right pinkie finger and is uncertain to take the field for the Astros.
Bennett Sousa	POS RP	STATUS Out	INJURY Elbow	Notes Sousa is dealing with a left elbow inflammation and has been placed on the 15-day injured list.

full roster and injuries

MIA

HOU

33.28

At Bats

33.59

4.48

Runs

4.54

846

Hits

826

3.38

Walks

3.32

8.16

Strikeouts

8.15

0.326

On Base Percentage

0.314

0.408

Slugging Percentage

0.411

4.05

Earned Run Average

4.77

3.96

Earned Runs

4.70

0.99

Home Runs

1.38

3.46

Walks

4.39

858

Strikeouts

896

0.09

Strikeouts Per 9 Innings

0.09

1.25

Walks Plus Hits Per Inning Pitched

1.40

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How the Miami Marlins vs. Houston Astros Market Resolves

The Over 2.5 market resolves YES if three or more total runs score across both teams through five complete innings. A Miami Marlins win or loss does not directly determine resolution; the run total does. The NO outcome lands if the first five innings produce two runs or fewer. Both teams bring real run-scoring ability, which helps explain why 80 percent of the market capital sits on the Over.

• YES (Over 2.5 runs through 5 innings): 80%
• NO (Under 2.5 runs through 5 innings): 20%

The NO outcome at 20 percent has a path. Blanco posted a 1.06 ERA across five MiLB rehab outings and may return sharper than expected. Junk has shown early-count command at times this season. The Marlins enter on a six-game losing streak, which can suppress offensive output.

Market Signals and Form

The momentum composite tells one clear story: a large directional move over 24 hours, a slight pullback in the last hour, and a trend score signaling consolidation rather than reversal. The catalyst is Blanco’s activation — a pitcher returning from Tommy John surgery carries real uncertainty, and the market has priced that toward the Over. Miami dropped six straight heading into Houston.

Volume conviction backs the move. Nearly all of the $76,490 in total volume arrived in a single 24-hour window — a fresh, actively debated market. Liquidity of $880,200 confirms depth and supports the 80 percent probability as genuine capital conviction.

The full-game total sits at 8.5 runs, with the Astros listed at -1.5 on the spread. The MLB World Series Champion 2026 market carries a strong positive correlation with tonight’s outcome, linking Houston’s season trajectory to this game’s result.

• Ronel Blanco: Returning from Tommy John surgery, 1.06 ERA in five MiLB rehab starts, last MLB appearance May 2025 — the key wildcard driving Over sentiment
• Janson Junk (MIA): Posted a 4.57 ERA and 1.31 WHIP in 2026, giving up runs at an above-average rate
• Jeremy Pena (HOU): Listed day-to-day with a hamstring issue, which could affect Houston’s run production early
• Christian Walker (HOU): Day-to-day with a hip issue, another potential lineup gap for the Astros
• Momentum composite: Up 22 percent in 24 hours, slightly off in the last hour, trend score 31.73 — market consolidating after a significant run to 80 percent

Lines Analysis: Can the Under at 20 Percent Cash?

The Over case rests on two vulnerable starters. Blanco is a genuine unknown after 14 months away from big-league hitters. Junk carries a 4.57 ERA and 1.31 WHIP. Xavier Edwards (.296, 37 RBI, 14 stolen bases) gives Miami a multidimensional threat against a rusty arm.

The Under’s case is narrow but real. Blanco’s 1.06 ERA in five MiLB rehab starts suggests he may return sharper than expected. Junk has shown stretches of command this year. The market priced the Under at 20 percent for a reason.

• Over path: Blanco’s rustiness leads to early baserunners; Junk’s 1.31 WHIP continues; run-scoring in innings one through four
• Under path: Blanco’s MiLB form (1.06 ERA) carries over; Junk finds early command; Houston’s lineup gaps (Pena, Walker) shrink run potential
• Injury watch: Both Jeremy Pena and Christian Walker are day-to-day; their lineup status before first pitch is the key pregame number
• Blanco activation risk: Post-Tommy John debuts typically bring elevated pitch counts, not necessarily more runs — the bullpen becomes a factor early

Lifetime volume of $76,490, arriving almost entirely in one day, reflects strong fresh conviction on the Over. The 80 percent pricing carries real weight.

LINES VERDICT

OVER (YES OUTCOME)

The first-five-innings Over market has strong backing and a clear catalyst in Blanco’s uncertain debut, and the market has priced both starters’ risk in a way that heavily favors early-inning run scoring.