Astros vs Phillies Prediction Market Odds, September 10, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
Astros | +1.5 — | O 0.5 — | 100%100% | 100% Kalshi |
Phillies | -1.5 — | U 0.5 — | 0%0% | — |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
Houston Astros | +1.5 — | O 0.5 — | 100%100% | 100% Kalshi |
Philadelphia Phillies | -1.5 — | U 0.5 — | 0%0% | — |
Houston and Philadelphia meet in the rubber game of a three-game set at Citizens Bank Park on September 10, 2026, first pitch 1:05 PM ET, with the series tied 1-1 after a 6-5 Astros win and an 11-7 Phillies win. Zack Wheeler (12-5, 3.23 ERA) starts against Cristian Javier (2-5, 5.98 ERA), and that gap is why the market made Philadelphia (82-64) a 63% favorite over Houston (74-72) in the September 9 evening snapshot. The board carries roughly $36.3K in lifetime volume across Kalshi and Polymarket; the live board above has the current prices.
Philadelphia has the better record, the better starter, and the home dugout in this one, and the board reflects all three. The Phillies (82-64) entered the night of September 9, 2026 priced at a 63% chance to win the series finale against Houston (74-72), with first pitch at 1:05 PM ET at Citizens Bank Park. The full board carries roughly $36.3K in lifetime volume across Kalshi and Polymarket, and the two venues sit within 2 points of each other on the moneyline. This is the rubber game: Houston took the opener 6-5 on September 8 and Philadelphia answered 11-7 on September 9.
Astros vs Phillies Odds and the Pitching Matchup
Zack Wheeler (12-5, 3.23 ERA) starts for Philadelphia against Cristian Javier (2-5, 5.98 ERA) for Houston, and that gap is the single clearest reason the market is not closer. Wheeler has been the Phillies' most reliable starter all season, and Javier carries an ERA nearly three runs higher into a park that has been kind to left-handed power. As of the September 9 evening snapshot, Kalshi had Philadelphia at 64% and Polymarket at 62%, with Houston at 38% and 39% respectively. A 2-point cross-platform gap is inside normal noise, so there is no meaningful price advantage on either side of the moneyline right now.
Liquidity, however, is not split evenly. Kalshi carries about $25.5K of lifetime volume across the two moneyline legs against roughly $816 on Polymarket for the same event. Kalshi is the price of record here, and the Polymarket quote is best read as tracking it rather than offering an independent opinion. Both books quote real two-sided prices on the moneyline (Kalshi at 64/38, Polymarket at 62/39), so neither leg is an untraded midpoint.
Line movement has been quiet. Across every snapshot this board carries, captured between 8:24 PM and 10:42 PM ET on September 9, the Phillies moneyline did not move once: Kalshi printed 64% at each of its four captures and Polymarket printed 62% at each of its five. That window covers a few hours of evening pregame trade rather than a full open-to-now move, so it describes stability overnight, not a settled full-day line.
Astros vs Phillies Spread, Total, and Alt Markets
The run line tells the same story with more precision. Philadelphia at -1.5 sits at 44% on both Kalshi and Polymarket, meaning the market gives the Phillies roughly a 63% chance to win and about a 44% chance to win by two or more. Houston at -1.5 prices at 28% on both venues. Widen the number and the prices fall off predictably: Philadelphia -2.5 trades at 34% and Philadelphia -3.5 at 25%, both Kalshi-only rungs with no matched Polymarket leg.
The full-game total is the most balanced line on the board. Over 8.5 runs prices at 50% on Kalshi and 50% on Polymarket, a genuine coin flip on an afternoon game. Over 9.5 sits at 40% (Kalshi) and 39% (Polymarket), and Over 7.5 at 58% and 56%. That structure implies a projected total in the high 8s, which is a slightly elevated number consistent with the 11-7 and 6-5 finals the first two games produced. Team totals lean the same way the moneyline does: Philadelphia over 3.5 runs prices at 64% while Houston over 3.5 prices at 50%.
The derivative markets are where the afternoon start gets interesting. A run in the first inning trades at 49% on Kalshi and 48% on Polymarket. First five innings Over 4.5 runs prices at 50% on Kalshi. Polymarket also lists a three-way first-five winner: Philadelphia 52%, Houston 32%, and a tie at 14%, which is a cleaner way to isolate the Wheeler-versus-Javier stretch than the full-game moneyline. Player props for both starters are listed on the board (Wheeler strikeout rungs at 4.5, 5.5, 6.5 and 7.5, Javier at 1.5 through 7.5) but none of them carry a two-sided quote yet, so they hold no signal at the moment.
When the Astros vs Phillies Market Resolves
The moneyline resolves to the team that wins the game on September 10, 2026 at Citizens Bank Park, with the winning contract paying $1 per share and the losing contract paying $0. The spread and total contracts settle against the official final score, including any extra innings. Kalshi and Polymarket both settle once the game is posted official, which for a 1:05 PM ET start typically means late afternoon the same day. If the game is postponed, suspended, or shortened, each venue applies its own published rules for that contract, and settlement waits for an official result rather than a partial score.
Key Astros vs Phillies Catalysts
- Starting pitching gap: Wheeler (12-5, 3.23 ERA) against Javier (2-5, 5.98 ERA) is the largest single input into the 63% price.
- Series state: the set is tied 1-1 after a 6-5 Houston win and an 11-7 Philadelphia win, so this is a rubber game with both offenses already producing.
- Division stakes: Philadelphia is 3 games behind Atlanta in the NL East at 82-64, while Houston leads the AL West by 2 games over Texas at 74-72.
- Liquidity concentration: Kalshi holds about $25.5K of the moneyline lifetime volume against roughly $816 on Polymarket, so watch Kalshi for the real move.
- Total priced at a coin flip: Over 8.5 runs sits at 50% on both venues, the most genuinely uncertain line on the board.
- Afternoon getaway day: a 1:05 PM ET start after a Wednesday night game raises the odds of rested-lineup decisions on both sides.
Related Astros vs Phillies Markets
The first two games of this set are still live on the site: the September 8 opener that Houston won 6-5, and the September 9 game that Philadelphia took 11-7. For the wider picture, the Philadelphia Phillies hub tracks every Phillies market on both venues as the NL East race runs out, and the Houston Astros hub does the same for a team defending a 2-game AL West lead. Every other game on the slate is priced side by side on the MLB prediction markets page.
Resolution Criteria
The moneyline resolves to the team that wins the game between the Houston Astros and Philadelphia Phillies on September 10, 2026 at Citizens Bank Park, scheduled for 1:05 PM ET. The winning team's contract pays $1 per share and the losing team's contract pays $0. Run line contracts (Philadelphia -1.5, Houston -1.5, and the alternate rungs) and total contracts (Over 8.5 runs and the alternate rungs) settle against the official final score, extra innings included. First five inning markets settle on the score after five completed innings. Both Kalshi and Polymarket settle once the game is posted official, which for an afternoon start usually means the same day. If the game is postponed, suspended, or called short of an official result, each venue applies its own published rules for that contract and settlement waits for an official result rather than a partial score.
Key Factors
- Zack Wheeler (12-5, 3.23 ERA) starting for Philadelphia against Cristian Javier (2-5, 5.98 ERA) for Houston
- Series tied 1-1 after Houston won 6-5 on September 8 and Philadelphia won 11-7 on September 9
- Philadelphia sits 3 games behind Atlanta in the NL East at 82-64 with a 41-33 home record
- Houston leads the AL West by 2 games over Texas at 74-72 with a 37-34 road record
- Kalshi holds about $25.5K of the moneyline lifetime volume against roughly $816 on Polymarket, so Kalshi is the price of record
- Full-game Over 8.5 runs priced at 50% on both venues, the most balanced line on the board
What are the current Astros vs Phillies odds?
In the September 9, 2026 evening snapshot, Philadelphia was a 63% favorite on the moneyline (64% on Kalshi, 62% on Polymarket) and Houston was priced at roughly 38% (38% Kalshi, 39% Polymarket). Prices move up to first pitch, so the live board above the article is the current source.
Who is the favorite in Astros vs Phillies on September 10, 2026?
Philadelphia is the favorite, carrying an implied win probability near 63% with Zack Wheeler (12-5, 3.23 ERA) on the mound against Houston's Cristian Javier (2-5, 5.98 ERA). Philadelphia is 82-64 overall and 41-33 at Citizens Bank Park.
Where can I trade the Astros vs Phillies market?
Both Kalshi and Polymarket list the game. Kalshi carries the liquidity, with about $25.5K in lifetime volume across the two moneyline legs against roughly $816 on Polymarket, and Kalshi also lists the deeper run line, total, team total, and first five inning rungs.
What is the run line and total for Astros vs Phillies?
Philadelphia -1.5 priced at 44% on both Kalshi and Polymarket, and Houston -1.5 at 28% on both. The full-game Over 8.5 runs sat at 50% on each venue, with Over 9.5 near 40% and Over 7.5 near 57%, implying a projected total in the high 8s.
When does the Astros vs Phillies market resolve?
It resolves on the final score of the September 10, 2026 game at Citizens Bank Park, first pitch 1:05 PM ET, with settlement on both venues once the result is official. Watch the first five inning market on Polymarket (Philadelphia 52%, Houston 32%, tie 14%) as the cleanest read on the Wheeler versus Javier stretch.