| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Rays | +1.5 65%66% | O 1 47%47% | 49%48% | 49% Kalshi |
â–¶Tigers | -1.5 35%34% | U 1 53%53% | 52%53% | 53% Polymarket |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Tampa Bay Rays | +1.5 | O 1 | 49% Kalshi | |
â–¶Detroit Tigers | -1.5 | U 1 | 53% Polymarket |
Detroit is the 52.5c favorite (52c Kalshi, 53c Polymarket) against a Tampa Bay team that is 78-53 and leads the AL East, because Tigers starter Troy Melton carries a 1.60 ERA and Rays starter Freddy Peralta carries a 5.33. The series is tied 1-1 at Comerica Park after 4-1 wins by each side, first pitch is 1:10 PM ET on August 26, 2026, and the board holds about $5.5K in lifetime volume across both platforms.
Tampa Bay is 78-53 and leads the AL East. Detroit is 62-70, fourth in the AL Central, and has lost eight of its last ten. The moneyline has Detroit as the 52.5c favorite anyway (52c Kalshi, 53c Polymarket) because the Rays vs Tigers price is being set by two starting pitchers, not two standings lines. Detroit hands the ball to Troy Melton, 7-2 with a 1.60 ERA. Tampa Bay counters with Freddy Peralta, 5-11 with a 5.33 ERA. That is a 3.73-run ERA gap in Detroit's favor, and it is worth roughly 16 games of record inversion to the market.
This is the rubber game of a three-game set at Comerica Park, and both sides have already won 4-1. Tampa Bay took the opener on August 24, Detroit answered on August 25, and the finale starts at 1:10 PM ET. The Kalshi ticker for the game encodes a 13:10 ET first pitch and the ESPN scoreboard lists the same time, so the two independent sources agree.
The Rays vs Tigers moneyline is one of the tightest full-game boards on the slate. Detroit prices at 52c on Kalshi and 53c on Polymarket, Tampa Bay at 49c on Kalshi and 48c on Polymarket. A 1c cross-platform gap on both sides is inside normal book noise, so neither venue is offering a materially different read on this game. Volume is where the two diverge: the board carries about $5.5K in lifetime volume, and roughly $4.5K of that sits on Kalshi's two moneyline legs. Polymarket's side of the pair has traded about $80 lifetime, which means the 53c Detroit print there rests on very thin flow and should be weighted accordingly.
Across the snapshot captures the board holds, taken between roughly 8:15 PM and 10:15 PM ET on August 25, the line did not move. Kalshi printed Detroit at 52c on every capture in that window and Polymarket printed 53c on both of its captures, with Tampa Bay holding 49c and 48c respectively. That is a two-hour window on a next-day board, so it describes overnight stability rather than a full price history.
The run line tells the same near-coin-flip story from a different angle. Detroit -1.5 trades at 34.5c (35c Kalshi, 34c Polymarket) and Tampa Bay -1.5 at 36c on both platforms. The market gives the Rays the slightly better chance of a multi-run win even while making them the moneyline underdog, which is the expected shape when the favorite's edge comes from run prevention rather than offense.
Totals are priced tight to a sportsbook number of 8. Over 7.5 sits at 53c, over 8.5 at 45c, and over 9.5 at 34.5c. Interpolating those three, the market's implied total lands just under 8.5, and the first-inning run market at 47c says the same thing about early scoring. Melton's 1.60 ERA is the reason the number is not higher.
Both lineups have a legitimate power bat. Junior Caminero leads Tampa Bay with 35 home runs and 84 RBI, and Chandler Simpson carries a .308 average. Detroit's Dillon Dingler has 26 home runs and 82 RBI, with Kevin McGonigle hitting .280. On Polymarket's home run props, Dingler and Spencer Torkelson are the top-priced bats at 9c each to go deep, with Jonathan Aranda at 8c and Colt Keith and McGonigle at 7c. Polymarket also lists a five-inning result market with Detroit at 45c, Tampa Bay at 41c, and a tie at 16c, which reads slightly more Detroit-leaning than the full-game moneyline does.
The read: Detroit at 52.5c is a pitching-matchup price on a team playing 2-8 baseball, and Tampa Bay at 48.5c is a discount on the better roster because of who is starting. The Detroit Tigers hub shows how far the season-long boards have already faded this club, which is exactly why the market is willing to pay for one Melton start rather than the team behind him. The August 25 meeting is the immediate comparison point.
The moneyline resolves to whichever team wins the game at Comerica Park on August 26, 2026, with a scheduled 1:10 PM ET first pitch. Run line contracts settle on the final margin of victory, and total contracts settle on combined runs scored by both teams once the game is official. Winning contracts pay $1 per share and losing contracts settle at $0. If the game is suspended, postponed, or shortened, both Kalshi and Polymarket apply their own published rules for official games and rescheduled contests.
Melton's ERA is the price: Detroit's 52.5c number rests on a 7-2, 1.60 ERA starter, so a late scratch would reprice the whole board.
Peralta's 5.33 ERA is the discount: Tampa Bay is 78-53 and still under 50c, which is entirely a starting-pitcher adjustment.
Series stakes: the set is tied 1-1 after 4-1 wins by each team, and this is the finale.
Total anchored near 8: over 8.5 at 45c and over 7.5 at 53c bracket a sportsbook total of 8.
Thin Polymarket book: about $80 of the roughly $5.5K board volume sits on Polymarket's moneyline pair, so its 53c print carries less information than Kalshi's 52c.
Form versus roster: Detroit is 2-8 in its last ten and Tampa Bay is 4-6, so recent results argue against the favorite the market has chosen.
Tampa Bay's season-long boards are the better context for this game than the day price is. The AL East winner market prices the division race the Rays currently lead at 78-53, and the Rays win total market tracks whether that pace holds through September. On the other side, the Tigers playoff market carries the more relevant number for a 62-70 club sitting fourth in its division, and the AL Central winner market shows how far out of that race Detroit has drifted. Every MLB game and futures board for the day is on the MLB hub.
The moneyline resolves to the team that wins the game between the Tampa Bay Rays and Detroit Tigers at Comerica Park on August 26, 2026, scheduled for a 1:10 PM ET first pitch. Run line contracts settle on the final margin of victory and total contracts settle on the combined runs scored by both teams, in each case once the game is official under MLB rules. Winning contracts pay $1 per share and all other contracts settle at $0. If the game is suspended, shortened, or postponed to a later date, Kalshi and Polymarket each apply their own published official-game and rescheduling rules, which can void or defer settlement.
As of the evening of August 25, 2026, Detroit is the 52.5c favorite (52c on Kalshi, 53c on Polymarket) and Tampa Bay trades at 48.5c (49c Kalshi, 48c Polymarket). The two platforms are within 1c of each other on both sides.
Detroit is favored at an implied 52.5% despite a 62-70 record against Tampa Bay at 78-53. The inversion comes from the pitching matchup: Tigers starter Troy Melton is 7-2 with a 1.60 ERA and Rays starter Freddy Peralta is 5-11 with a 5.33 ERA.
First pitch is scheduled for 1:10 PM ET on August 26, 2026 at Comerica Park, and the market settles once the game goes final. Both the Kalshi game ticker and the ESPN scoreboard list the same 1:10 PM ET start.
Both Kalshi and Polymarket list the game. The board carries about $5.5K in lifetime volume, with roughly $4.5K of it on Kalshi moneyline contracts and about $80 on the Polymarket moneyline pair.
Detroit -1.5 trades at 34.5c and Tampa Bay -1.5 at 36c. On totals, over 7.5 runs is 53c, over 8.5 is 45c, and over 9.5 is 34.5c, which puts the implied total just under 8.5.
Confirm both starters on the official lineup card, since a Melton scratch would reprice Detroit off 52.5c immediately. Also watch weather at Comerica Park for the 1:10 PM ET start and whether the over 8.5 contract moves off 45c.