Cleveland Guardians vs Detroit Tigers Prediction Market Odds, August 12, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Guardians | +1.5 64%64% | O 1 47%46% | 27%27% | 27% Kalshi |
â–¶Tigers | -1.5 36%36% | U 1 53%54% | 32%33% | 33% Polymarket |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Cleveland Guardians | +1.5 | O 1 | 27% Kalshi | |
â–¶Detroit Tigers | -1.5 | U 1 | 33% Polymarket |
Detroit is the 55.5c favorite for game two at Comerica Park (56c Kalshi, 55c Polymarket) against Cleveland at 46c, and the market is paying for form rather than for the starting pitcher. Cleveland hands the ball to Foster Griffin (12-4, 3.31 ERA) against Detroit's Framber Valdez (7-7, 4.17 ERA), yet the Tigers are 8-2 over their last ten games while the Guardians are 2-8. Detroit (59-60) took the opener 6-4 on August 11 and sits 2.5 games back in the AL Central; Cleveland (58-62) is 4 back. The live board above carries the current cross-platform prices across roughly $62.6K in combined volume.
Detroit opened the series with a 6-4 win on August 11 and the moneyline followed it up, moving from 54c to 56c on Kalshi. That is the whole story of this line: two sub-.500 teams separated by one game in the standings, with the market siding heavily with the club that is playing better right now.
Guardians vs Tigers Market Context
Detroit enters at 59-60 overall and 31-27 at Comerica Park, 2.5 games behind the Chicago White Sox (61-57) in an AL Central where four teams sit within four games of first place. Cleveland is 58-62 overall and 30-31 on the road, 4 games back. The Tigers have won eight of their last ten. The Guardians have lost eight of their last ten, and that ten-game split is doing more work in the price than either team's season record.
The starting pitching matchup argues the other way. Foster Griffin takes the ball for Cleveland at 12-4 with a 3.31 ERA, the better line on both counts against Framber Valdez, who is 7-7 with a 4.17 ERA for Detroit. The strikeout market agrees with that read even while the moneyline does not: Griffin's over 4.5 strikeouts trades at 62c on Kalshi while Valdez's same line sits at 47c, and Griffin's 3+ strikeouts is priced at 88c. A market that expects the visiting starter to miss more bats and still installs the home team as a 55.5c favorite is pricing lineup, bullpen, and home field, not the first five innings.
Cross-platform agreement is close to total here. Detroit is 56c on Kalshi and 55c on Polymarket, a 1c gap, and Cleveland is 46c on both books. Two exchanges landing within a cent of each other on a $27.5K moneyline is a well-arbitraged price, not a pricing disagreement to lean on. Traders looking for divergence on this board will find none on the game winner.
What the Guardians vs Tigers Spread and Total Imply
The run line is nearly symmetric. Detroit at minus 1.5 trades at 36c on both platforms, Cleveland at minus 1.5 at 34c on both. The gap between those two numbers is 2c, which is the market saying it expects a one-run or two-run game with either side capable of taking it. Detroit at minus 2.5 sits at 26.5c and Cleveland at minus 2.5 at 25.5c, so the board assigns roughly a one-in-four chance to a three-run-or-better margin in either direction.
The total is centered just under 9. Over 8.5 runs trades at 47c, the 9.5 line at 36c, and the 7.5 line at 55c, which brackets the implied number right around 8.5 combined runs. Comerica Park and two starters with sub-4.20 and 3.31 ERAs support that. The first-five-innings market carries the same shape: over 4.5 runs through five sits at 48.5c (48c Kalshi, 49c Polymarket), and a run scored in the first inning is priced at 46.5c.
Detroit's team total over 3.5 runs is 56c against Cleveland's over 3.5 at 53c, a 3c edge to the home side that mirrors the moneyline read almost exactly. The board is not calling for a blowout in either direction.
Guardians vs Tigers Player Props on the Board
The prop layer is where the individual matchups price out. Jose Ramirez carries the most liquid bat market on the board: 1+ hits at 69c, 2+ total bases at 43c, and a home run at 12c (13c Kalshi, 11c Polymarket). Steven Kwan sits at 68c for 1+ hits and 38c for 2+ total bases. On the Detroit side, Dillon Dingler leads the club with 26 home runs and 80 RBI and his home run market trades at 8c on Polymarket, where Kalshi has no matching line.
Cleveland's offensive leaders are Chase DeLauter (.281 average, 57 RBI) and Rhys Hoskins (13 home runs). Detroit counters with Kevin McGonigle hitting .288. Neither lineup profiles as an offense that runs up a big number, which is consistent with a total parked near 8.5.
On the mound, Valdez's 6+ strikeouts prices at 31c and his 8+ at 10c, while Griffin's 7+ strikeouts trades at 27c and his 9+ at 9c. The market gives Griffin the longer strikeout tail. See the Detroit Tigers hub and the Cleveland Guardians hub for each club's full market inventory.
When the Guardians vs Tigers Market Resolves
The game starts at 6:40pm ET on August 12, 2026 at Comerica Park in Detroit. The moneyline resolves as soon as the game goes final, typically within three hours of first pitch, to whichever club wins. Spreads settle on the final margin and totals on combined runs scored, both using the official MLB box score.
Key Guardians vs Tigers Catalysts
Starter mismatch versus form: Griffin (12-4, 3.31 ERA) is the better arm on paper against Valdez (7-7, 4.17 ERA), but Detroit is 8-2 in its last ten and Cleveland is 2-8.
Series carryover: Detroit won the series opener 6-4 on August 11, and the moneyline firmed from 54c to 56c on Kalshi behind it.
AL Central positioning: Detroit is 2.5 games back and Cleveland 4 back of the White Sox, so this is a direct swing game in a four-team race.
Home split: Detroit is 31-27 at Comerica Park; Cleveland is 30-31 away from Progressive Field.
Total centered near 8.5: Over 8.5 runs at 47c and the 9.5 line at 36c bracket the implied number, with a first-inning run at 46.5c.
No cross-platform gap: Detroit is 56c on Kalshi and 55c on Polymarket with Cleveland at 46c on both, so the two books are effectively in agreement on the game winner.
Related Guardians vs Tigers Markets
Both clubs carry season-long inventory beyond this game. The Detroit Tigers hub tracks Detroit's division and playoff markets, the Cleveland Guardians hub does the same for Cleveland, and the MLB league hub aggregates every live game board and futures market across the league. For the first half of this series, the August 11 opener carries the pre-game board and the 6-4 result. Broader coverage sits at the baseball category hub.
Resolution Criteria
The moneyline resolves to the team that wins the game played at Comerica Park in Detroit on August 12, 2026, with a scheduled first pitch of 6:40pm ET. Each winning contract pays $1 per share and the losing side settles at $0. Run line contracts settle on the final margin of victory and total-runs contracts on combined runs scored, both using the official MLB box score once the game is declared final. First-five-innings markets settle on the score after the top and bottom of the fifth. If the game is postponed, suspended, or shortened before it becomes an official game, each platform applies its own void or carry-forward rule, so check the specific market rules on Kalshi and Polymarket before the scheduled start.
Key Factors
- Foster Griffin (12-4, 3.31 ERA) starts for Cleveland against Framber Valdez (7-7, 4.17 ERA) for Detroit
- Detroit is 8-2 in its last ten games; Cleveland is 2-8 over the same stretch
- Detroit won the series opener 6-4 on August 11 and the moneyline firmed from 54c to 56c on Kalshi
- AL Central race: Detroit 2.5 games back, Cleveland 4 back of the Chicago White Sox (61-57)
- Total is centered near 8.5 runs, with over 8.5 at 47c and the 9.5 line at 36c
- Detroit is 56c on Kalshi and 55c on Polymarket while Cleveland is 46c on both, a 1c cross-platform gap
What are the current Guardians vs Tigers odds?
As of the morning of August 12, 2026, Detroit is the favorite at 55.5c on average, trading at 56c on Kalshi and 55c on Polymarket. Cleveland is priced at 46c on both platforms. That implies roughly a 55% chance Detroit wins.
Who is favored in Guardians vs Tigers on August 12, 2026?
Detroit is favored at 55.5c despite Cleveland starting the better pitcher on paper. The market is weighting Detroit's 8-2 record over its last ten games and a 31-27 home mark at Comerica Park against Cleveland's 2-8 stretch.
Who are the probable starting pitchers for Guardians vs Tigers?
Cleveland starts Foster Griffin, who is 12-4 with a 3.31 ERA. Detroit starts Framber Valdez, who is 7-7 with a 4.17 ERA. The strikeout market prices Griffin's over 4.5 at 62c and Valdez's over 4.5 at 47c on Kalshi.
Where can I trade the Guardians vs Tigers market?
The game trades on both Kalshi and Polymarket, with roughly $62.6K in combined volume across the full board on August 12, 2026. The moneyline alone accounts for about $27.5K of that on the Detroit side.
What is the Guardians vs Tigers run line and total?
Detroit at minus 1.5 trades at 36c on both platforms and Cleveland at minus 1.5 at 34c, a nearly symmetric run line. The total sits near 8.5 combined runs, with over 8.5 at 47c and the 9.5 line at 36c.
What should I watch before Guardians vs Tigers resolves?
Watch the lineup cards and any late scratch to either starter, since Griffin and Valdez carry the strikeout and first-five-innings pricing. The AL Central gap is the other lever: Detroit sits 2.5 games back and Cleveland 4 back entering August 12, 2026.