White Sox vs Red Sox Prediction Market Odds, August 5, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
▶Sox | — | O 1 47%45% | 42%42% | 42% Kalshi |
▶Sox | — | U 1 53%55% | 60%59% | 60% Kalshi |
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Boston is the 59.5c home favorite for the middle game of this three-game set at Fenway Park (60c on Kalshi, 59c on Polymarket), with Chicago at 43c, and that price sits within a tick of ESPN’s 59.6% matchup projection. The Red Sox (60-51) have won eight of their last ten and swept the White Sox 3-0 in Chicago in July by a combined 15-2. Chicago (59-52) leads the AL Central and starts Sean Burke, whose 3.04 ERA, 1.10 WHIP and 140 strikeouts are the sharper peripheral line against Sonny Gray. First pitch is 7:10 pm ET on August 5, 2026, and the live board above carries current Kalshi and Polymarket prices.
Boston is the 59.5c favorite for the middle game of this three-game set at Fenway Park (60c on Kalshi, 59c on Polymarket), with the Chicago White Sox at 43c. One game separates these clubs in the standings, 60-51 against 59-52, but the standings are not what the board is pricing. It is pricing Sonny Gray, home field, and a July sweep in which Boston outscored Chicago 15-2. First pitch is 7:10 pm ET on Wednesday, August 5, 2026.
White Sox vs Red Sox Market Context
The records are close enough to be noise, and the futures boards separate the two teams more than the win column does. Boston is 60-51 and third in the AL East, trading at 14c on the AL East division market behind Tampa Bay at 53.5c. Chicago is 59-52 and leads the AL Central, priced at 53c on its division board with Cleveland second at 32.5c. On the postseason markets Boston is 84.5c to qualify against 69c for Chicago, so the market treats the Red Sox as the safer October team even though the White Sox own a division lead.
Form favors Boston. The Red Sox are 8-2 over their last ten, including three straight wins at Los Angeles on August 1 and August 2. Chicago is 5-5 across the same window after splitting four games with the Yankees and taking two of three at Tampa Bay.
The venue split is the wrinkle. Boston is 25-29 at Fenway Park and 35-22 on the road, an inverted home profile, while Chicago is 34-21 at home and 25-31 away. The home-field premium normally baked into a 59.5c price is doing less work here than the label suggests, and the White Sox arrive with the weaker half of their own split. The season series is the cleaner argument for the favorite: Boston leads it 3-0 after sweeping in Chicago from July 7 to July 9 by scores of 8-1, 5-0 and 2-1.
Burke vs Gray Sets the White Sox vs Red Sox Price
Sonny Gray carries a 13-2 record with a 2.93 ERA, a 1.17 WHIP and 98 strikeouts across 113.2 innings in 20 starts. Sean Burke is 7-5 with a 3.04 ERA, a 1.10 WHIP and 140 strikeouts across 124.1 innings in 22 appearances, 18 of them starts. The win-loss gap is a run-support artifact: Burke has the lower WHIP, 42 more strikeouts, 11 more innings and the higher WAR (3.8 against 2.4). On rate stats this is close to even on the mound, which is the case for 43c on Chicago rather than against it.
The lineups tilt back toward Boston. Willson Contreras leads the Red Sox with 23 home runs and 67 RBIs and Ceddanne Rafaela hits .289, but Trevor Story is on the 60-day injured list and Adley Rutschman on the 10-day. Chicago answers with Colson Montgomery at 25 home runs and Miguel Vargas at 66 RBIs, with Austin Hays on the 60-day injured list and Braden Montgomery listed day to day.
White Sox vs Red Sox Line Movement and the Cross-Platform Read
The Boston side opened at 58c on Kalshi on August 3, traded down to 53c, spiked to 65c, and settled at 60c. Polymarket tracked the same path from the other side, with the White Sox contract sliding from 46c to 42c. Net movement across the window is 2c toward Boston inside a 12c intraday range, so the favorite has firmed without a decisive move.
The three-game set prices the starters cleanly. The series opener on August 4 has Boston at 55c behind Patrick Sandoval, this game moves Boston to 60c with Gray on the mound, and the August 6 finale sits at 62c. The Gray start is worth roughly 5c over the opener by the market's own arithmetic.
Cross-platform, the books are within 2c on both sides. Kalshi shows Boston 60c and Chicago 44c, Polymarket shows Boston 59c and Chicago 42c. Kalshi's two sides sum to 104c against Polymarket's 101c, so the underdog ticket is the cheaper fill on Polymarket while the favorite costs a cent more on Kalshi. ESPN's matchup model puts Boston at 59.6%, within a tick of the 59.5c consensus, so there is no model-versus-market disagreement to trade. The open question is narrower: whether 43c is enough compensation for a first-place club starting the higher-strikeout arm.
When the White Sox vs Red Sox Market Resolves
The moneyline resolves to the team that wins the game at Fenway Park on August 5, 2026, scheduled for 7:10 pm ET. Winning contracts pay out at $1 per share and the losing side settles at zero, with both platforms settling once the game is official. A rain delay does not change resolution as long as the game finishes that night. A postponement pushes settlement to the completion of the rescheduled game, and a game called before it becomes official voids per each platform's published rules.
Key White Sox vs Red Sox Catalysts
- Starting pitching: Sean Burke (3.04 ERA, 1.10 WHIP, 140 strikeouts) against Sonny Gray (2.93 ERA, 1.17 WHIP, 13-2), the closest input on the card.
- Home-road inversion: Boston is 25-29 at Fenway and 35-22 on the road, which undercuts the standard home premium in a 59.5c price.
- Season series: Boston has won all three meetings by a combined 15-2, the strongest single argument behind the favorite.
- Cross-platform pricing: Chicago is 44c on Kalshi and 42c on Polymarket, a 2c edge for the underdog buyer on Polymarket.
- Availability: Trevor Story and Adley Rutschman are out for Boston, Austin Hays is out for Chicago and Braden Montgomery is day to day.
- Standings stake: Chicago defends a 53c AL Central lead while Boston plays for a wild card at 84.5c to qualify.
Related White Sox vs Red Sox Markets
The rest of the set trades alongside this game: the August 4 opener and the August 6 finale both carry Kalshi and Polymarket moneylines. Season-long exposure runs through the Boston playoff market at 84.5c, the AL Central board where Chicago sits at 53c, and the World Series market. Full team pages for the Boston Red Sox and the Chicago White Sox collect every active contract on each club, and the baseball hub carries the rest of the day's MLB board.
Resolution Criteria
The moneyline resolves to the team that wins the game at Fenway Park on August 5, 2026, first pitch scheduled for 7:10 pm ET. Each winning team contract pays $1 per share and the losing side settles at zero, with Kalshi and Polymarket settling once the game is official and the final score is posted. Weather delays do not affect resolution as long as the game is completed that night. If the game is postponed, settlement moves to the completion of the rescheduled game, and a contest called before reaching official length is voided under each platform’s published rules. Run-line and total markets on the same board settle on the final score, including extra innings.
Key Factors
- Sean Burke (3.04 ERA, 1.10 WHIP, 140 strikeouts) against Sonny Gray (2.93 ERA, 1.17 WHIP, 13-2 record)
- Boston home-road inversion: 25-29 at Fenway Park against 35-22 on the road
- Season series: Boston leads 3-0 after a July sweep in Chicago by a combined 15-2
- Cross-platform gap on the underdog: Chicago 44c on Kalshi against 42c on Polymarket
- Availability: Trevor Story and Adley Rutschman out for Boston, Austin Hays out for Chicago
- Standings stake: Chicago defends a 53c AL Central lead, Boston is 84.5c to make the playoffs
What are the current White Sox vs Red Sox odds?
As of August 5, 2026, Boston is the 59.5c favorite (60c on Kalshi, 59c on Polymarket) and Chicago trades at 43c (44c on Kalshi, 42c on Polymarket). That is roughly a 60% implied chance for the Red Sox at Fenway Park.
Who is favored in White Sox vs Red Sox on August 5, 2026?
Boston is favored at a 59.5c consensus, an implied 60% chance. ESPN’s matchup model independently projects the Red Sox at 59.6%, so the market and the model agree within a tick.
Who are the probable starting pitchers for White Sox vs Red Sox?
Chicago starts Sean Burke, 7-5 with a 3.04 ERA, a 1.10 WHIP and 140 strikeouts in 124.1 innings. Boston starts Sonny Gray, 13-2 with a 2.93 ERA, a 1.17 WHIP and 98 strikeouts in 113.2 innings.
Where can I trade the White Sox vs Red Sox market?
The game trades on both Kalshi and Polymarket, and the board above shows both books side by side. On August 5, 2026 the underdog is the cheaper ticket on Polymarket at 42c against 44c on Kalshi.
How did the White Sox vs Red Sox line move?
Boston opened at 58c on Kalshi on August 3, traded as low as 53c, spiked to 65c and settled at 60c. Net movement is 2c toward the Red Sox inside a 12c intraday range, and the August 4 opener priced Boston at 55c.
What should I watch before the White Sox vs Red Sox market resolves?
Watch the Fenway weather and any late scratch to Gray or Burke, since the series shows a starter swing worth about 5c. The first-inning run market at 49.5c is the cleanest read on how the books see these two arms early.