Red Sox vs Yankees Prediction Market Odds, August 28, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
▶Sox | — | O 1 52%46% | 44%45% | 45% Polymarket |
▶Yankees | — | U 1 48%54% | 57%56% | 57% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
▶Boston Red Sox | — | O 1 | 45% Polymarket | |
▶New York Yankees | — | U 1 | 57% Kalshi |
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The Yankees are the 56.5c moneyline favorite (57c Kalshi, 56c Polymarket) for Friday's 7:15 PM ET series opener at Yankee Stadium, a price implying roughly a 56% win probability. New York is 75-57 and Boston is 73-60, both 7-3 over their last 10, and the Red Sox hold the season series 5-4. The separation the market is pricing is the mound: Cam Schlittler carries a 2.16 ERA, second in MLB, against Patrick Sandoval's 4.54.
Boston arrives in the Bronx 2.5 games behind New York for the second wild card and 6 games behind Tampa Bay (79-54) in the AL East, so the Red Sox vs Yankees series opener carries real seeding weight with a month left in the schedule. Both clubs are 7-3 over their last 10. Boston has been the better road team all season at 39-28, a stronger mark than its own 34-32 record at Fenway, and New York is an ordinary 34-29 at Yankee Stadium. The market still favors the home side, and the reason is on the mound.
Red Sox vs Yankees Market Context
Cam Schlittler is the single biggest input into this board. The Yankees right-hander is 11-6 with a 2.16 ERA, second in all of MLB, and he is why a 75-57 team gets priced above a 73-60 team that has already beaten it five times in nine meetings this season. Boston counters with Patrick Sandoval at 1-2 and a 4.54 ERA. That is a gap of more than two full runs of earned run average between the two starters, and it is effectively the entire moneyline edge.
The underlying team profiles argue the other direction. Boston hits: a .251 team average that ranks sixth in MLB, 1,110 hits (eighth), 600 runs scored. New York does not: .230 as a team, 28th in the league, 586 runs. What keeps the Yankees in front is run prevention, a 3.24 team ERA that ranks first in baseball, with Boston third at 3.48. A contact-and-volume offense against the best staff in the sport is why this price sits near a coin flip instead of at a comfortable favorite's number.
The head-to-head record is the strongest argument against the favorite. New York swept the first three meetings of the season in April, then lost five of the six that followed in June, leaving Boston up 5-4 in the season series with four games left between them. Boston's road profile backs that up: 39-28 away from Fenway, a better winning percentage than the Yankees have managed at home at 34-29. A team that wins 58% of its road games facing a home side that wins 54% of its own is not a natural underdog, and the 12c spread between the two moneylines is carried almost entirely by the starting pitchers rather than by team quality.
The individual production splits the same way. Ben Rice is the Yankees' power source with 35 home runs and 83 RBI, and Cody Bellinger leads the regulars at .258. Boston runs through Ceddanne Rafaela at .285 and Willson Contreras at 26 home runs and 78 RBI. Neither lineup gives the opposing starter an obvious hole to work, which is part of why the two books have landed within a cent of each other on the winner.
Line movement supports the read that this is tightening rather than separating. Since the board began carrying snapshots on August 26, the Yankees' Kalshi price has drifted from 60c down to 57c, while Polymarket has held flat at 56c across the same captures. That is a 3c move toward Boston on the venue carrying the volume, and it closed a spread that started at 4c. The books now sit 1c apart on the moneyline, which is agreement rather than an edge. The one line where they genuinely disagree is the first-inning run market: Kalshi prices a run in the first at 52c against Polymarket's 46c, a 6c difference and the widest on this board. Current prices on every line are on the live board above.
When the Red Sox vs Yankees Market Resolves
The market settles on the final score of the game at Yankee Stadium on Friday, August 28, 2026, with first pitch scheduled for 7:15 PM ET on NESN and Apple TV. Both the Kalshi ticker and the ESPN schedule carry the same 7:15 PM ET start. The moneyline pays the winning team's contract at $1 per share and the losing side at $0, with extra innings included in the official result. Kalshi and Polymarket both wait for the game to be declared complete before settling.
Key Red Sox vs Yankees Catalysts
- Schlittler's ERA: Cam Schlittler (11-6, 2.16) ranks second in MLB in earned run average and is the largest single input into the Yankees' 56.5c price.
- Sandoval's deficit: Patrick Sandoval (1-2, 4.54) hands Boston a starting-pitcher gap of more than two runs of ERA.
- Bats against arms: Boston's .251 team average (sixth in MLB) meets New York's 3.24 team ERA (first in MLB), the structural conflict of the game.
- Seeding stakes: New York leads Boston by 2.5 games for wild card position, with both teams 7-3 in their last 10 and Boston holding the season series 5-4.
- Cross-platform read: Kalshi has moved the Yankees from 60c to 57c since August 26 while Polymarket held 56c, and the two books disagree by 6c only on the first-inning run market.
Related Red Sox vs Yankees Markets
Both clubs price on the season-long boards as well. The AL pennant market and the World Series market carry the postseason version of this same wild card race, and the AL MVP market tracks the bats named above. For every open contract on either club, the New York Yankees hub and the Boston Red Sox hub collect the full slate, and MLB prediction markets covers the rest of the league's daily boards.
Resolution Criteria
The moneyline resolves to the team that wins the game at Yankee Stadium on Friday, August 28, 2026, scheduled for 7:15 PM ET. The winning team's contract pays $1 per share and the losing team's contract settles at $0, with the official final score including extra innings as the source of truth. The first-inning market resolves Yes if either team scores at least one run in the first inning and No if the inning is scoreless. Kalshi and Polymarket settle once the game is declared official, so a weather-shortened game that reaches the regulation point settles on the score at that moment. A postponed game carries to its makeup date on both platforms, and a game canceled outright without a makeup voids and refunds under each platform's rules.
Key Factors
- Cam Schlittler (11-6, 2.16 ERA, second in MLB) is the largest single input into the Yankees' 56.5c price
- Patrick Sandoval (1-2, 4.54 ERA) leaves Boston with a starting-pitcher gap of more than two runs of ERA
- Boston's .251 team average (sixth in MLB) against New York's 3.24 team ERA (first in MLB)
- New York leads Boston by 2.5 games for wild card position with both teams 7-3 in their last 10
- Kalshi moved the Yankees from 60c to 57c since August 26 while Polymarket held flat at 56c
- The first-inning run market carries a 6c cross-platform gap (Kalshi 52c, Polymarket 46c), the widest on the board
What are the current Red Sox vs Yankees odds?
As of August 27, 2026, the Yankees trade at 56.5c on the cross-platform average (57c Kalshi, 56c Polymarket) and the Red Sox at 44.5c (44c Kalshi, 45c Polymarket). The board has taken about $1.7K in lifetime volume, with the bulk of it on the Boston moneyline.
Who is pitching in Red Sox vs Yankees on August 28, 2026?
New York starts Cam Schlittler, who is 11-6 with a 2.16 ERA that ranks second in MLB. Boston starts Patrick Sandoval, who is 1-2 with a 4.54 ERA.
Where can I trade the Red Sox vs Yankees market?
Both Kalshi and Polymarket list the game. Kalshi carries it under the KXMLBGAME series with a separate first-inning run market, and Polymarket lists the same matchup as a two-outcome moneyline plus the first-inning contract.
When does the Red Sox vs Yankees market resolve?
First pitch is 7:15 PM ET on Friday, August 28, 2026, at Yankee Stadium, and the market settles once the game is declared official. Extra innings count toward the final score.
What should I watch before the Red Sox vs Yankees game starts?
Watch the Kalshi moneyline, which has drifted from 60c to 57c on the Yankees since August 26 while Polymarket held 56c, and watch the first-inning run market where the two books disagree by 6c. A late scratch to either starter would move the board more than any other single event.