Detroit Tigers vs Seattle Mariners Final Score and Odds Recap, August 4, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
Tigers | +2.5 — | O 7.5 12%10% | 98% | 98% Kalshi |
Mariners | -2.5 — | U 7.5 — | 1% | 1% Kalshi |
Seattle was the 58c home favorite (58c Kalshi, 57c Polymarket) and Detroit the 43c underdog. Detroit won 8-0. The moneyline was close to a coin flip and the dog side settled at 100c, but the derivative lines blew out with it: Detroit -1.5 settled at 100c and the game finished on 8 runs, clearing every Over line at 7.5 and below. The board carried roughly $1.0M in cumulative volume across Kalshi and Polymarket.
The Seattle Mariners closed as the 58c home favorite over the Detroit Tigers on August 4, 2026, and lost 8-0. That is the whole page in one line: the market had the right shape of read, a near coin flip with a small lean to the home side, and got both the winner and the margin wrong.
Tigers vs Mariners Market Read Against the Final Score
The pre-game board had Seattle at 58c (58c on Kalshi, 57c on Polymarket) and Detroit at 43c, about 1c of vig across the pair. A 58c favorite is not a strong opinion. It implies roughly a 58% chance of a Seattle win and roughly a 43% chance of a Detroit win, close to two games in five for the road side. Detroit winning was therefore not the surprise. The shape of the win was.
Money had already leaked toward Detroit before first pitch. The Tigers moneyline on Polymarket opened the trading day at 42c and drifted up to 44c on the last snapshot before the game, while Kalshi's Seattle side ticked from 58c down to 57c. That is a 2c move, small enough that it is not a signal on its own, but it points the same direction the result did.
The distinction that matters is between the moneyline and the derivative lines. A 58c price carries the information "slight edge, expect a close game." It does not carry "expect a comfortable win," and it certainly does not carry "expect a shutout." So the moneyline was only mildly wrong, and a 43c dog winning is a routine market outcome. The run line and the total had no such defense. Detroit -1.5 settled at 100c on both books, and the game total landed on 8 runs with every one of them scored by the underdog.
How the Tigers vs Mariners Game Played Out
Nothing happened early. The first-inning run market settled at 1c, correctly, because both clubs went scoreless through two frames.
Detroit broke it open in the third. Riley Greene reached on an infield single to shortstop and Gleyber Torres scored on a throwing error by shortstop Colt Emerson, then Colt Keith singled to right to score Dillon Dingler and Greene. Three runs, one of them unearned. Greene added a 403-foot home run to center in the fifth for a 4-0 lead, which was already more offense than Seattle produced all night.
Troy Melton did the rest. He went 7 innings on 3 hits with 2 walks and 4 strikeouts, allowed no runs, and lowered his ERA to 1.58 while improving to 7-1. Jacob Waguespack followed with a hitless inning and Yilber Diaz struck out 3 in the ninth. Seattle finished with 4 hits and no runs, with single hits from Randy Arozarena, Dominic Canzone, Julio Rodriguez, and Cal Raleigh.
The ninth is where the derivative markets died. Seranthony Dominguez recorded one out and gave up 4 hits, 4 runs, 2 walks, and 2 home runs, a 2-run shot from Torres to left center and a solo homer from Dingler to right center. Kevin McGonigle had already driven in a run on a groundout earlier in the inning. Detroit's night at the plate: Greene 3-for-5, Keith 3-for-4 with 2 RBI, Zach McKinstry 3-for-3.
Emerson Hancock took the loss and fell to 6-6, allowing 8 hits and 4 runs (3 earned) with 6 strikeouts over 6 innings, moving his ERA to 3.33. Attendance at T-Mobile Park was 35,752.
The standings read is flat and unhelpful for Seattle. Detroit improved to 55-58 and Seattle fell to 55-59. Both clubs sat on 55 wins and both were under .500, so a shutout loss at home cost Seattle a game in the loss column against a club it is directly measured against.
How the Tigers vs Mariners Market Settled
The Detroit moneyline settled at 100c on Kalshi and Polymarket, and Seattle at 0c on both. Detroit -1.5 settled at 100c, since an 8-run win clears a 1.5-run line without argument. On the total, 8 runs cleared every Over line at 7.5 and below and missed 8.5, so Over 7.5 resolved Yes and Over 8.5 resolved No. The first-5-innings total settled Over 3.5 and Under 4.5, matching Detroit's exact 4 runs through 5 innings.
Player props settled cleanly against the box score. Home run markets at O/U 0.5 resolved Yes for Greene, Torres, and Dingler, and No for Cal Raleigh. Hancock's strikeout market at O/U 5.5 resolved Yes on 6 strikeouts. The board carried roughly $1.0M in cumulative volume across the two platforms with a verified cross-platform pairing on the moneyline, so both books settled the same question rather than two lookalike questions.
Key Tigers vs Mariners Takeaways
- Underdog cashed: Detroit priced at 43c on the moneyline and won outright, settling at 100c on both books.
- Melton was the game: 7 innings, 3 hits, 0 runs, 4 strikeouts, ERA down to 1.58 and record up to 7-1.
- Four-hit shutout: Detroit's three pitchers held Seattle to 4 hits, and no Mariners runner scored.
- Ninth-inning blowout: 4 of Detroit's 8 runs came against Seranthony Dominguez, who allowed 2 home runs while recording one out.
- The total split two lines: 8 runs cleared Over 7.5 and missed Over 8.5, landing exactly between two live markets.
- Standings: Detroit to 55-58, Seattle to 55-59, the two clubs level on wins and separated by one loss.
Related Tigers vs Mariners and MLB Markets
The series continued the next two days at T-Mobile Park, with Tigers vs Mariners on August 5 and the series finale on August 6. For season-long pricing on both clubs, the Detroit Tigers hub and the Seattle Mariners hub carry World Series, division, and win-total markets, and the MLB hub aggregates every game board and futures market on the league.
Resolution Criteria
The moneyline resolved to the team that won the game, Detroit, which beat Seattle 8-0 at T-Mobile Park on August 4, 2026. Detroit contracts paid $1 per share and Seattle contracts resolved to $0 on both Kalshi and Polymarket. The run line settled on the final margin, so Detroit -1.5 resolved Yes on an 8-run win and Seattle -1.5 resolved No. The total settled on combined runs scored by both clubs, 8, so Over lines at 7.5 and below resolved Yes and Over lines at 8.5 and above resolved No. Player props settled against the official box score, and the first-inning run market resolved No because neither club scored in the opening frame. All markets settled once the game went final on the scheduled date, with no suspension, postponement, or void.
Key Factors
- Detroit priced at 43c on the moneyline and won outright, settling at 100c on Kalshi and Polymarket
- Troy Melton threw 7 shutout innings on 3 hits with 4 strikeouts, lowering his ERA to 1.58 and improving to 7-1
- Detroit pitching combined for a 4-hit shutout, with Waguespack and Yilber Diaz covering the last 2 innings
- Seranthony Dominguez allowed 4 runs and 2 home runs while recording one out in the ninth
- The game total landed on 8 runs, clearing Over 7.5 and missing Over 8.5
- Detroit improved to 55-58 and Seattle fell to 55-59, leaving both clubs level on wins
Who won the Tigers vs Mariners game on August 4, 2026?
The Detroit Tigers won 8-0 at T-Mobile Park. Detroit scored 3 runs in the third inning, 1 in the fifth on a Riley Greene home run, and 4 in the ninth, while Seattle was held scoreless on 4 hits.
Was the prediction market right about Tigers vs Mariners?
No. Seattle was the 58c home favorite (58c Kalshi, 57c Polymarket) and Detroit the 43c underdog. Detroit won outright, and the Tigers moneyline settled at 100c on both books.
Did the Tigers vs Mariners run line and total land?
Detroit -1.5 settled at 100c on both platforms, since Detroit won by 8. The total finished on 8 combined runs, which cleared Over 7.5 and missed Over 8.5.
Who were the starting pitchers in Tigers vs Mariners?
Troy Melton started for Detroit and took the win, going 7 innings on 3 hits with 4 strikeouts and no runs, dropping his ERA to 1.58. Emerson Hancock started for Seattle and took the loss, allowing 4 runs on 8 hits over 6 innings.
Where did the Tigers vs Mariners market trade?
On Kalshi and Polymarket. The game board carried roughly $1.0M in cumulative volume across both platforms, with a verified cross-platform pairing on the moneyline.
What comes next for the Tigers and Mariners after August 4, 2026?
The series continued at T-Mobile Park on August 5 and August 6, 2026. Detroit left the opener at 55-58 and Seattle at 55-59, with both clubs under .500 and level on wins.