Washington Mystics vs. Golden State Valkyries Result: Gabby Williams Clears 13.5

Gabby Williams exceeded 13.5 points in the Washington Mystics vs. Golden State Valkyries matchup on July 18, 2026, settling the Polymarket player-props market at 100 percent YES. Williams, the Golden State Valkyries forward and one of the WNBA’s most consistent scorers, delivered another performance above her 13.5-point threshold, continuing a season in which she averages 15.0 points per game. The Valkyries extended their dominance over Washington, improving to 7-0 all-time against the Mystics heading into the contest.

Traders closed this market at 100 percent probability that Williams would go over 13.5 points — a decisive resolution after the market opened at 50 percent on the day. The YES outcome hit, and the market’s surge late on July 18 reflected sharp movement toward the over as the game unfolded in real time at Chase Center in San Francisco.

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What Happened: Washington Mystics vs. Golden State Valkyries, July 18, 2026

Golden State Valkyries hosted Washington Mystics at Chase Center, with the Valkyries entering on an eight-game winning streak — the longest in franchise history at that point. Golden State carried an 18-7 record into the game, while Washington arrived at 12-11 and fighting to stay competitive in the Eastern Conference playoff race. The Valkyries had won six straight against the Mystics entering this matchup, and that dominance carried over.

Gabby Williams anchored the Golden State offense, clearing the 13.5-point line and adding her usual two-way impact on the defensive end. Janelle Salaün contributed alongside Williams in the frontcourt, and Veronica Burton continued her strong playmaking from the guard spot, averaging 5.2 assists per game entering July 18. Washington’s Shakira Austin battled on the boards, but the Valkyries’ depth and defensive structure proved too much to overcome. Golden State controlled the contest and claimed their ninth straight win.

How the Market Called It: Gabby Williams Points O/U 13.5

The Gabby Williams Points O/U 13.5 market on Polymarket opened at 50 percent on the day of the game — a coin flip between the over and the under. By the time the final buzzer sounded on July 18, the market closed at 100 percent YES, with $420,362 in total volume and $412,824 moving in the final 24 hours alone. That late-session surge reflected the market correctly pricing Williams over her threshold as the game played out.

Williams averages 15.0 points per game this season, making 13.5 a line set right at the range where a quiet night could push her under. The market’s opening-day uncertainty — priced at 50 percent — reflected that real variance. Williams resolved any doubt with a performance well above the threshold, and traders who backed the YES outcome at equal odds turned the right call. The $420,362 in total volume behind this market shows significant trader interest in WNBA player-prop markets on Polymarket.

What Is Next for the Golden State Valkyries

Golden State Valkyries followed this win over Washington Mystics with another home matchup against the Mystics in the second game of back-to-back meetings at Chase Center. The Valkyries, sitting at 18-7 and surging, remain one of the Western Conference’s top contenders heading into the second half of the 2025-26 WNBA season. Gabby Williams and Veronica Burton continued to drive the team’s two-way identity, and Kiki Iriafen’s rebounding (9.4 per game) gives Golden State a consistent interior presence.

Live markets on Lines.com track the Valkyries’ next matchup and future WNBA Championship odds. If Williams continues at her 15.0-point pace, player-prop markets on her scoring will stay active and competitively priced on Polymarket. Head to the WNBA hub on Lines.com to find the next live market for Golden State.

LINES RESOLUTION VERDICT

GABBY WILLIAMS OVER 13.5 POINTS — YES

Williams cleared the 13.5-point threshold in the July 18, 2026 contest between the Golden State Valkyries and Washington Mystics, settling the market at YES. The result matched the market’s closing signal — traders who moved this from 50 percent to 100 percent on game day read Williams correctly.