| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Mystics | -1.5 59% | O 168.5 45%44% | 63%63% | 63% Kalshi |
â–¶Mercury | +1.5 41% | U 168.5 55%56% | 37%38% | 38% Polymarket |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Mystics | -1.5 | O 168.5 | 63% Kalshi | |
â–¶Mercury | +1.5 | U 168.5 | 38% Polymarket |
Washington is the road favorite at 61c on both Kalshi and Polymarket over Phoenix at 41c on Kalshi and 40c on Polymarket, a 20c gap for a 23-15 team visiting a 13-25 Mercury side that is 5-13 at home. The Mystics have won both prior meetings, 95-75 on August 9 and 94-84 in Phoenix on August 25. The board carries $47.5K in lifetime volume, with Washington -2.5 at 55c and the total split between 168.5 on Kalshi and 166.5 on Polymarket.
Washington is back at Mortgage Matchup Center two nights after beating Phoenix 94-84 in the same building, and the market responded by pushing the Mystics up rather than fading them. Washington trades at 61c on both Kalshi and Polymarket, Phoenix at 41c on Kalshi and 40c on Polymarket, with $47.5K in lifetime volume across the two platforms. Tip is 10:00 PM ET (7:00 PM local) on August 27, 2026, on Prime Video. Washington arrives 23-15 and two games back in the Eastern Conference, Phoenix at 13-25 and on a three-game losing streak.
The standings carry the pricing. Washington is 23-15 overall and 10-8 on the road, tied with New York for third in the East and two games behind Atlanta at 25-13, with six games left on the schedule starting tonight. Phoenix is 13-25, 5-13 at home, and sits 17.5 games back in the West, tied with Los Angeles and ahead of only Seattle. A 10-game gap in the standings, on the road, priced at 61c is a restrained number, and it reflects the venue rather than any doubt about which roster is better.
The season series is the strongest evidence on the board. Washington leads it 2-0 and both wins were comfortable: 95-75 in Washington on August 9, then 94-84 in Phoenix on August 25. Tonight is the third and final scheduled meeting. Two straight double-digit results against the same opponent, one of them in this arena 48 hours ago, is the kind of sample that keeps a road team favored at a full 20c margin over the home side.
Personnel favors Washington in the places the game usually turns. Shakira Austin leads the Mystics at 16.9 points and 9.5 rebounds, with Sonia Citron at 4.3 assists running the distribution. Phoenix counters with Kahleah Copper at 20.9 points, the highest scoring average on either roster, and Alyssa Thomas as the offensive hub at 8.3 assists and 7.7 rebounds. The Mercury injury report is the swing factor: Kelsey Plum is listed day-to-day, while Marta Suarez, Kyara Linskens and Jovana Nogic are all out. Washington has no players on the report.
On line movement, the board carries 684 snapshot ticks, 50 of them on the two moneyline legs, covering roughly the last four hours of trading. Washington opened that window at 58c on Kalshi and 57c on Polymarket and has traded up to 61c on both, a 3c to 4c move in the same direction on each book. Phoenix drifted from 43c down to 41c on Kalshi and 40c on Polymarket over the same captures. That is a short history, so the honest read is a steady 3c bid for the Mystics inside the window the board actually holds, not a claim about the full day.
The primary spread is Washington -2.5, priced at 55c on Polymarket. The Kalshi alternate ladder extends it cleanly: Washington by 5 or more (-4.5) trades at 46c on $3.3K of lifetime volume, Washington by 8 or more (-7.5) at 36c on $1.0K, and Washington by 14 or more (-13.5) at 19c. The ladder is monotone from 61c on the moneyline down to 19c on the biggest number, which means the board is internally consistent and there is no dislocated rung to trade against. What it says in plain terms: the market is confident Washington wins and much less confident it wins the way it did in the two prior meetings, both of which cleared 10 points.
The total is the one place the two books disagree. Kalshi's most-traded rung is over 168.5 points at 45c on $5.0K of lifetime volume, while Polymarket carries the total at 166.5 with the over at 50c. Kalshi's own ladder brackets that gap sensibly, with over 165.5 at 53c, over 162.5 at 61c and over 159.5 at 67c. The two prior meetings landed at 170 and 178 combined points, both above the current number, which is the argument for the over. Team totals lean the same way: Washington over 72.5 points sits at 91c and Phoenix over 70.5 at 84c. The first-half total is priced at 76c to the over on 70.5.
Player props are Polymarket-side and untraded, so treat them as quotes rather than markets. Alyssa Thomas over 7.5 assists is the closest to a coin flip at 51c, which fits her 8.3 season average. Michaela Onyenwere over 8.5 points sits at 44c, Sonia Citron over 5.5 assists at 42c against a 4.3 average, and Kahleah Copper over 3.5 rebounds at 39c. Every one of those rungs shows $0 in lifetime volume, so the prices reflect a maker's model rather than a traded consensus.
The Mystics vs Mercury market resolves on the final score of the game played August 27, 2026 at Mortgage Matchup Center in Phoenix, with settlement expected within a few hours of the final buzzer. The moneyline pays $1 per share on the team that wins the game, overtime included, and $0 on the other side. The spread and total contracts settle against that same final score, with team totals and the first-half total settling on their respective segments. Both Kalshi and Polymarket close trading at tip and settle once the game is official. A postponement carries the market to the rescheduled date rather than voiding it, and a canceled game voids under each platform's own rules.
This game feeds the season-long boards directly. The Washington Mystics playoff market is the one that actually moves on the result, with the Mystics tied for third in the East and six games left, and the Washington Mystics win total is the cleaner way to trade the same view over the rest of the schedule. On the Phoenix side, the Mercury playoff market and the Mercury win total have already been repriced by a 13-25 record. For the top of the league, the 2026 WNBA champion board is where Washington's seeding eventually matters, and the Valkyries vs Liberty board is the other game on tonight's slate. Full league coverage sits on the WNBA hub.
Resolves on the final score of the Washington Mystics at Phoenix Mercury game played August 27, 2026 at Mortgage Matchup Center in Phoenix, tipping at 10:00 PM ET. The moneyline pays $1 per share on the team that wins the game with overtime included and $0 on the losing side. Spread contracts settle on the winning margin against the stated number, the game total settles on combined points scored by both teams, team totals settle on that team's final points, and the first-half total settles on combined points through two quarters. Kalshi and Polymarket both close trading at tip and settle once the game is ruled official by the WNBA. A postponement moves the contract to the rescheduled date rather than voiding it; a canceled game voids under each platform's published rules.
As of August 27, 2026, Washington is the favorite at 61c on both Kalshi and Polymarket, and Phoenix trades at 41c on Kalshi and 40c on Polymarket. The board carries $47.5K in lifetime volume across the two platforms.
Washington is favored at 61c on the cross-platform average, an implied win probability near 61%, against Phoenix at roughly 40.5c. Washington is 23-15 and Phoenix is 13-25 with a 5-13 home record.
Both Kalshi and Polymarket list the game. Kalshi carries the deeper book with the moneyline, the spread ladder, team totals and a first-half total, while Polymarket carries the primary spread at Washington -2.5 and the untraded player props.
The primary spread is Washington -2.5 at 55c on Polymarket, with Washington -4.5 at 46c on Kalshi. The total is split between the books: Kalshi prices over 168.5 at 45c and Polymarket carries 166.5 with the over at 50c.
It resolves on the final score of the game tipping at 10:00 PM ET on August 27, 2026 at Mortgage Matchup Center, with settlement on both platforms within a few hours of the final buzzer.
Kelsey Plum's day-to-day status is the biggest single input on the Phoenix side, and the 2-point difference between the Kalshi and Polymarket totals is the one number the two books cannot agree on.