About This Market
San Francisco Giants vs.
San Francisco Giants vs. Boston Red Sox (7:10 PM ET) — MLB game held on 2026-08-21. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
Live prediction market odds for San Francisco Giants vs. Boston Red Sox (7:10 PM ET). Compare prices across Kalshi and Polymarket US and Polymarket and ProphetX.
MLB·Resolved 2026-08-21
This market resolved on 2026-08-21. Boston Red Sox was the officially declared outcome. Prior to resolution, the market peaked at 98%.
San Francisco Giants vs.
San Francisco Giants vs. Boston Red Sox (7:10 PM ET) — MLB game held on 2026-08-21. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.
| Candidate | ![]() | ![]() | ![]() | |
|---|---|---|---|---|
Drew Gilbert Over 1.5 Home Runs | — | — | 100% | — |
Jung Hoo Lee Under 1.5 Home Runs | — | — | 100% | — |
Adley Rutschman Under 1.5 Home Runs | — | — | 100% | — |
Ceddanne Rafaela Under 1.5 Home Runs | — | — | 100% | — |
Nick Sogard Under 1.5 Home Runs | — | — | 100% | — |
Wilyer Abreu Under 1.5 Home Runs | — | — | 99% | — |
Adley Rutschman Under 0.5 Home Runs | — | — | 99% | 99% |
Christian Koss Under 0.5 Home Runs | — | — | — | 99% |
Drew Cavanaugh Under 0.5 Home Runs | — | — | — | 99% |
Jarren Duran Under 0.5 Home Runs | — | — | — | 99% |
Osleivis Basabe Under 0.5 Home Runs | — | — | — | 99% |
Over 2.5 runs scored | 99% | — | — | — |
Rafael Devers Over 0.5 Hits | 99% | — | — | — |
Rafael Devers Over 0.5 Hits + Runs + RBIs | 99% | — | — | — |
Rafael Devers Over 0.5 RBIs | 99% | — | — | — |
Rafael Devers Over 1.5 Total Bases | 99% | — | — | — |
Rafael Devers Over 2.5 Hits + Runs + RBIs | 99% | — | — | — |
Rafael Devers Over 2.5 Total Bases | 99% | — | — | — |
Rafael Devers Over 3.5 Total Bases | 99% | — | — | — |
Sonny Gray Over 17.5 Pitcher Outs | 99% | — | — | — |
Sonny Gray Over 2.5 Strikeouts | 99% | — | — | — |
Caleb Durbin Under 1.5 Home Runs | — | — | 99% | — |
Andruw Monasterio Under 0.5 Home Runs | — | — | — | 99% |
Caleb Durbin Under 0.5 Home Runs | — | — | 99% | 99% |
Mickey Gasper Under 0.5 Home Runs | — | — | — | 99% |
Willy Adames Under 0.5 Home Runs | — | — | 99% | 99% |
Boston Red SoxWINNER | 98% | 98% | 100% | 98% |
Rafael Devers Under 1.5 Home Runs | — | — | 98% | — |
Sonny Gray Over 0.5 Earned Runs | 98% | — | — | — |
Wilyer Abreu Under 0.5 Home Runs | — | — | 98% | 99% |
Jung Hoo Lee Under 0.5 Home Runs | — | — | 98% | 99% |
Bryce Eldridge Under 0.5 Home Runs | — | — | 97% | 99% |
Nick Sogard Under 0.5 Home Runs | — | — | 97% | 99% |
Boston Red Sox spread plus 4.5 | — | — | — | 95% |
Willson Contreras Under 0.5 Home Runs | — | — | 99% | 95% |
Boston Red Sox spread plus 1.5 | — | — | 97% | 91% |
Total over 7.0 | — | — | — | 92% |
Boston Red Sox spread plus 3.5 | — | — | — | 90% |
Total under 10.5 | — | — | — | 90% |
Total under 12.5 | — | — | — | 89% |
San Francisco Giants spread plus 4.5 | — | — | — | 89% |
Total under 11.5 | — | — | — | 88% |
Total over 8.0 | — | — | — | 88% |
San Francisco Giants spread plus 3.5 | — | — | — | 87% |
Logan Webb Under 4.5 Strikeouts | — | — | — | 84% |
Boston Red Sox spread plus 2.5 | — | — | 82% | 82% |
Total over 9.5 | 99% | — | — | 81% |
Mickey Gasper Under 1.5 Hits + Runs + RBIs | — | — | — | 80% |
Logan Webb Over 4.5 Strikeouts | 1% | — | — | 80% |
Total over 3.5 | 99% | — | — | 80% |
Jarren Duran Under 1.5 Hits + Runs + RBIs | — | — | — | 78% |
Osleivis Basabe Under 0.5 Hits + Runs + RBIs | — | — | — | 78% |
Andruw Monasterio Under 1.5 Hits + Runs + RBIs | — | — | — | 77% |
Ceddanne Rafaela Under 1.5 Hits + Runs + RBIs | — | — | — | 77% |
San Francisco Giants spread plus 2.5 | — | — | 65% | 89% |
Drew Cavanaugh Under 0.5 Hits + Runs + RBIs | — | — | — | 74% |
Total over 9.0 | — | — | — | 74% |
Boston Red Sox spread plus 1.0 | — | — | — | 71% |
Drew Gilbert Over 0.5 Hits + Runs + RBIs | — | — | — | 71% |
Total over 4.5 | 99% | — | — | 70% |
Sonny Gray Under 5.5 Strikeouts | — | — | 58% | 81% |
Sonny Gray Over 5.5 Strikeouts | 99% | — | 47% | 90% |
Christian Koss Under 1.5 Hits + Runs + RBIs | — | — | — | 68% |
Total over 7.5 | 99% | — | 44% | 92% |
Boston Red Sox spread minus 1.5 | 99% | — | 43% | 91% |
Jung Hoo Lee Under 1.5 Hits + Runs + RBIs | — | — | — | 67% |
Osleivis Basabe Under 1.5 Hits + Runs + RBIs | — | — | — | 67% |
Willson Contreras Under 1.5 Hits + Runs + RBIs | — | — | — | 66% |
Wilyer Abreu Under 1.5 Hits + Runs + RBIs | — | — | — | 63% |
Christian Koss Over 0.5 Hits + Runs + RBIs | — | — | — | 62% |
Nick Sogard Under 1.5 Hits + Runs + RBIs | — | — | — | 61% |
Turner Hill Over 0.5 Hits + Runs + RBIs | — | — | — | 61% |
Bryce Eldridge Under 1.5 Hits + Runs + RBIs | — | — | — | 60% |
San Francisco Giants spread plus 1.0 | — | — | — | 60% |
Adley Rutschman Under 1.5 Hits + Runs + RBIs | — | — | — | 59% |
Andrew Knizner Over 0.5 Hits + Runs + RBIs | — | — | — | 59% |
Willy Adames Under 1.5 Hits + Runs + RBIs | — | — | — | 58% |
Caleb Durbin Under 1.5 Hits + Runs + RBIs | — | — | — | 57% |
Total over 8.5 | 99% | — | 35% | 79% |
Drew Gilbert Under 1.5 Hits + Runs + RBIs | — | — | — | 56% |
Drew Gilbert Over 1.5 Hits + Runs + RBIs | — | — | — | 55% |
Turner Hill Over 1.5 Hits + Runs + RBIs | — | — | — | 55% |
Rafael Devers Under 1.5 Hits + Runs + RBIs | — | — | — | 55% |
Total over 5.5 | 99% | — | — | 55% |
Caleb Durbin Over 1.5 Hits + Runs + RBIs | — | — | — | 54% |
Sonny Gray Over 1.5 Earned Runs | 54% | — | — | — |
Rafael Devers Under 0.5 Home Runs | — | — | 9% | 97% |
Adley Rutschman Over 1.5 Hits + Runs + RBIs | — | — | — | 52% |
Andrew Knizner Under 0.5 Hits + Runs + RBIs | — | — | — | 51% |
Total under 6.5 | — | — | 46% | 55% |
Total over 6.5 | 99% | — | 54% | 47% |
Ceddanne Rafaela Under 0.5 Home Runs | — | — | 50% | 99% |
Rafael Devers Over 1.5 Hits + Runs + RBIs | 99% | — | — | 49% |
Wilyer Abreu Over 1.5 Hits + Runs + RBIs | — | — | — | 49% |
Nick Sogard Over 1.5 Hits + Runs + RBIs | — | — | — | 48% |
Total under 5.5 | — | — | — | 48% |
Turner Hill Under 0.5 Hits + Runs + RBIs | — | — | — | 48% |
Total under 8.5 | — | — | 65% | 29% |
Christian Koss Under 0.5 Hits + Runs + RBIs | — | — | — | 47% |
Boston Red Sox spread minus 1.0 | — | — | — | 46% |
Bryce Eldridge Over 1.5 Hits + Runs + RBIs | — | — | — | 45% |
Willy Adames Over 1.5 Hits + Runs + RBIs | — | — | — | 45% |
Jung Hoo Lee Over 1.5 Hits + Runs + RBIs | — | — | — | 45% |
Osleivis Basabe Over 1.5 Hits + Runs + RBIs | — | — | — | 44% |
Willson Contreras Over 1.5 Hits + Runs + RBIs | — | — | — | 44% |
Christian Koss Over 1.5 Hits + Runs + RBIs | — | — | — | 41% |
San Francisco Giants spread plus 1.5 | — | — | 57% | 20% |
Drew Gilbert Under 0.5 Hits + Runs + RBIs | — | — | — | 38% |
Total under 7.5 | — | — | 56% | 16% |
Drew Cavanaugh Over 0.5 Hits + Runs + RBIs | — | — | — | 35% |
Total under 9.0 | — | — | — | 35% |
Total under 4.5 | — | — | — | 35% |
Jarren Duran Over 1.5 Hits + Runs + RBIs | — | — | — | 33% |
Osleivis Basabe Over 0.5 Hits + Runs + RBIs | — | — | — | 33% |
Sonny Gray Over 4.5 Strikeouts | 99% | — | 33% | — |
Sonny Gray Under 4.5 Strikeouts | — | — | 33% | — |
Ceddanne Rafaela Over 1.5 Hits + Runs + RBIs | — | — | — | 32% |
Andruw Monasterio Over 1.5 Hits + Runs + RBIs | — | — | — | 31% |
Mickey Gasper Over 1.5 Hits + Runs + RBIs | — | — | — | 31% |
San Francisco Giants spread minus 1.0 | — | — | — | 31% |
Caleb Durbin Over 0.5 Home Runs | — | — | 50% | 8% |
Total under 3.5 | — | — | — | 29% |
Ceddanne Rafaela Over 0.5 Home Runs | — | — | 50% | 5% |
Boston Red Sox spread minus 2.5 | 1% | — | 35% | 15% |
Total under 9.5 | — | — | — | 23% |
San Francisco Giants spread minus 2.5 | 1% | — | 19% | 23% |
Total under 8.0 | — | — | — | 20% |
Total over 12.5 | 1% | — | — | 18% |
San Francisco Giants spread minus 1.5 | 1% | — | 23% | 13% |
Total over 11.5 | 1% | — | — | 16% |
Sonny Gray Over 3.5 Strikeouts | 99% | — | 16% | — |
Sonny Gray Under 3.5 Strikeouts | — | — | 16% | — |
Boston Red Sox spread minus 4.5 | — | — | — | 15% |
Total over 10.5 | 1% | — | — | 14% |
Total under 7.0 | — | — | — | 14% |
Willson Contreras Over 0.5 Home Runs | — | — | 99% | 12% |
Logan Webb Over 5.5 Strikeouts | 12% | — | — | — |
Rafael Devers Over 1.5 RBIs | 12% | — | — | — |
Andruw Monasterio Over 0.5 Home Runs | — | — | — | 11% |
Rafael Devers Over 0.5 Home Runs | 99% | — | 9% | 12% |
Boston wins by over 3.5 runs | 2% | — | — | 17% |
San Francisco Giants spread minus 4.5 | — | — | — | 8% |
Logan Webb Over 6.5 Strikeouts | 8% | — | — | — |
San Francisco Giants spread minus 3.5 | 2% | — | — | 13% |
Mickey Gasper Over 0.5 Home Runs | — | — | — | 7% |
Willy Adames Over 0.5 Home Runs | — | — | 1% | 7% |
Drew Gilbert Over 0.5 Home Runs | — | — | 100% | 6% |
Osleivis Basabe Over 0.5 Home Runs | — | — | — | 5% |
Christian Koss Over 0.5 Home Runs | — | — | — | 5% |
Nick Sogard Over 0.5 Home Runs | — | — | 4% | 5% |
Bryce Eldridge Over 0.5 Home Runs | — | — | 3% | 6% |
Drew Cavanaugh Over 0.5 Home Runs | — | — | — | 4% |
Jarren Duran Over 0.5 Home Runs | — | — | — | 4% |
Turner Hill Over 0.5 Home Runs | — | — | — | 4% |
Wilyer Abreu Over 0.5 Home Runs | — | — | 2% | 6% |
Jung Hoo Lee Over 1.5 Home Runs | — | — | 4% | — |
Adley Rutschman Over 0.5 Home Runs | — | — | 2% | 5% |
Nick Sogard Over 1.5 Home Runs | — | — | 3% | — |
Jung Hoo Lee Over 0.5 Home Runs | — | — | 2% | 4% |
Logan Webb Over 3.5 Strikeouts | 3% | — | — | — |
Logan Webb Over 7.5 Strikeouts | 3% | — | — | — |
Logan Webb Over 8.5 Strikeouts | 3% | — | — | — |
Sonny Gray Over 7.5 Strikeouts | 3% | — | — | — |
Sonny Gray Over 8.5 Strikeouts | 3% | — | — | — |
Rafael Devers Over 1.5 Home Runs | 2% | — | 2% | — |
Rafael Devers Over 4.5 Total Bases | 2% | — | — | — |
San Francisco Giants | 2% | 2% | 100% | 4% |
Adley Rutschman Over 1.5 Home Runs | — | — | 1% | — |
Caleb Durbin Over 1.5 Home Runs | — | — | 1% | — |
Bryce Eldridge Under 1.5 Home Runs | — | — | 1% | — |
Logan Webb Over 18.5 Pitcher Outs | 1% | — | — | — |
Logan Webb Over 2.5 Strikeouts | 1% | — | — | — |
Rafael Devers Over 0.5 Stolen Bases | 1% | — | — | — |
Rafael Devers Over 1.5 Hits | 1% | — | — | — |
Rafael Devers Over 2.5 Hits | 1% | — | — | — |
Rafael Devers Over 3.5 Hits + Runs + RBIs | 1% | — | — | — |
Rafael Devers Over 4.5 Hits + Runs + RBIs | 1% | — | — | — |
Sonny Gray Over 6.5 Strikeouts | 1% | — | — | — |
Willson Contreras Over 1.5 Home Runs | — | — | 1% | — |
Willson Contreras Under 1.5 Home Runs | — | — | 1% | — |
Willy Adames Under 1.5 Home Runs | — | — | 1% | — |
Wilyer Abreu Over 1.5 Home Runs | — | — | 1% | — |
Ceddanne Rafaela Over 1.5 Home Runs | — | — | 0% | — |
Bryce Eldridge Over 1.5 Home Runs | — | — | 0% | — |
Drew Gilbert Under 1.5 Home Runs | — | — | 0% | — |
Willy Adames Over 1.5 Home Runs | — | — | 0% | — |
Logan Webb Over 0.5 Earned Runs | 0% | — | — | — |
Logan Webb Over 1.5 Earned Runs | 0% | — | — | — |
Logan Webb Over 2.5 Earned Runs | 0% | — | — | — |
Logan Webb Over 3.5 Earned Runs | 0% | — | — | — |
Logan Webb Over 4.5 Earned Runs | 0% | — | — | — |
Sonny Gray Over 2.5 Earned Runs | 0% | — | — | — |
Sonny Gray Over 3.5 Earned Runs | 0% | — | — | — |
Sonny Gray Over 4.5 Earned Runs | 0% | — | — | — |
Drew Gilbert Under 0.5 Home Runs | — | — | 0% | 99% |
Boston Red Sox
98.5% avg
Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket and Polymarket US and ProphetX.
KalshiIf San Francisco wins the San Francisco vs Boston professional baseball game originally scheduled for Aug 21, 2026 at 7:10 PM EDT, then the market resolves to Yes.
The following market refers to the San Francisco vs Boston professional baseball game originally scheduled for Aug 21, 2026 at 7:10 PM EDT. If this game is postponed or delayed, the market will remain open and close after the rescheduled game has finished (within two days). If the game is cancelled or rescheduled to over two days away, the market will resolve to a fair price in accordance with the rules. Kalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.
PolymarketIn the upcoming MLB game between the San Francisco Giants and Boston Red Sox, scheduled for August 21 at 7:10PM ET: This market will resolve to "San Francisco Giants" if the San Francisco Giants win the game. This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.
Polymarket USThis market will settle to the winner of the San Francisco Giants vs Boston Red Sox MLB game scheduled for 2026-08-21 at 7:10PM ET. Extra innings are included if played. If the game is delayed, postponed, or suspended and not rescheduled to a date within two weeks of the originally scheduled date, the market will settle to the last fair market price. Outcome sourced from MLB.
Sports moneyline - resolves based on official game outcome per ProphetX Prediction Rules
The outcomes listed above show how traders are pricing this question. Compare outcome prices from Kalshi, Polymarket US, Polymarket, ProphetX in one place. Each price reflects the market’s implied probability, not a guaranteed result. This event is archived; prices shown are historical.
The last available prices are Boston Red Sox: 98.0¢ on Kalshi, 99.9¢ on Polymarket, 98.1¢ on ProphetX, 98.0¢ on Polymarket US; San Francisco Giants: 2.0¢ on Kalshi, 99.9¢ on Polymarket, 4.1¢ on ProphetX, 2.0¢ on Polymarket US. Prices are quoted in cents per $1 share. Check the venue for executable prices and available liquidity. The last available price is not necessarily the final settlement price.
The largest price difference shown across venues is 97.9 percentage points. Venues have different traders, liquidity and fees, so their prices can differ. A price gap alone does not establish an executable arbitrage opportunity; compare settlement rules and the actual buy and sell prices.
For example, Boston Red Sox at 98.5¢ implies about a 98.5% chance. For a standard $1 contract, a share pays $1 if its outcome settles as correct and $0 if it settles as incorrect. A winning share bought at 40¢ earns 60¢ before fees. Check each venue’s settlement rules, fees and eligibility before trading. Historical prices alone do not identify the winning outcome.