Tigers vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for ALDS Game 3 on Oct. 8

Odds updated as of 5:12 a.m.

On Wednesday in the MLB, the Detroit Tigers are playing the Seattle Mariners in Game 4 of the ALDS.

Before checking out the MLB betting lines on FanDuel Sportsbook, we've got you covered, in terms of the most important information regarding this game.

Tigers vs Mariners Game Info

• Detroit Tigers (87-75) vs. Seattle Mariners (90-72)
• Date: Wednesday, October 8, 2025
• Time: 3:08 p.m. ET
• Venue: Comerica Park -- Detroit, Michigan
• Coverage: Fox Sports 1

Tigers vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: DET: (-116) | SEA: (-102)
• Spread: DET: +1.5 (-196) | SEA: -1.5 (+162)
• Total: 8.5 -- Over: (-105) | Under: (-115)

Tigers vs Mariners Probable Starting Pitchers

Probable Pitchers: Casey Mize (Tigers) - 14-6, 3.87 ERA vs Bryce Miller (Mariners) - 4-6, 5.68 ERA

The Tigers will look to Casey Mize (14-6, 3.87 ERA) versus the Mariners and Bryce Miller (4-6, 5.68 ERA). Mize's team is 16-12-0 against the spread this season in his starts. Mize's team has been victorious in 66.7% of the games he's started as the moneyline favorite with a record of 12-6. The Mariners have a 7-11-0 record against the spread in Miller's starts. The Mariners have been the underdog on the moneyline in seven of Miller's starts this season, and they went 2-5 in those matchups.

Tigers vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Tigers win (55.2%)

Tigers vs Mariners Moneyline

• Seattle is the underdog, -102 on the moneyline, while Detroit is a -116 favorite at home.

Tigers vs Mariners Spread

• The Mariners are 1.5-run favorites against the spread for this matchup with the Tigers. The Mariners are +162 to cover, while the Tigers are -196 to cover as a 1.5-run underdog on the runline.

Tigers vs Mariners Over/Under

• The Tigers-Mariners contest on Oct. 8 has been given an over/under of 8.5 runs. The over is set at -105 and the under at -115.

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Tigers vs Mariners Betting Trends

• The Tigers have been chosen as favorites in 107 games this year and have walked away with the win 59 times (55.1%) in those games.
• This year Detroit has won 57 of 102 games when listed as at least -116 on the moneyline.
• The Tigers and their opponents have hit the over in 79 of their 160 games with a total set by oddsmakers this season.
• The Tigers are 73-87-0 against the spread in their 160 games with a line set by sportsbooks this season.
• The Mariners have gone 19-22 in games they were the underdog on the moneyline (winning 46.3% of those games).
• When it has played as a moneyline underdog with odds of -102 or longer, Seattle has an 18-18 record (winning 50% of its games).
• The Mariners have combined with opponents to hit the over on the total 85 times this season for an 85-69-5 record against the over/under.
• The Mariners have covered 44.7% of their games this season, going 71-88-0 ATS.

Tigers Player Leaders

• Gleyber Torres leads Detroit in OBP (.358) this season, fueled by 136 hits. He has a .256 batting average and a slugging percentage of .387.
• Among all qualifying batters in the majors, he ranks 77th in batting average, 23rd in on-base percentage, and 118th in slugging.
• Torres has recorded a base hit in five games in a row. In his last five games he is hitting .286 with two doubles and a walk.
• Riley Greene has 155 hits to go with a slugging percentage of .493, both of which are best among Detroit hitters this season. He's batting .258 with an on-base percentage of .313.
• He is 69th in batting average, 104th in on-base percentage and 21st in slugging among qualified hitters.
• Spencer Torkelson has 135 hits this season and has a slash line of .240/.333/.456.
• Torkelson heads into this game with two games in a row with at least one hit. In his last five games he is hitting .158 with two doubles, three walks and five RBIs.
• Zach McKinstry has been key for Detroit with 117 hits, an OBP of .333 plus a slugging percentage of .438.

Mariners Player Leaders

• Cal Raleigh has racked up a team-best OBP (.359), while pacing the Mariners in hits (147). He's batting .247 and slugging.
• Including all the qualifying hitters in MLB, he is 98th in batting average, 20th in on-base percentage and third in slugging percentage.
• Raleigh heads into this game on a four-game hitting streak. In his last five games he is hitting .350 with a double, a home run, two walks and three RBIs.
• Julio Rodriguez is slugging .474 to lead his team. He has a batting average of .267 with an on-base percentage of .324.
• Including all qualifying hitters, he is 44th in batting average, 88th in on-base percentage and 38th in slugging percentage.
• Josh Naylor is batting .295 with 29 doubles, a triple, 20 home runs and 48 walks.
• Eugenio Suarez has 28 doubles, 49 home runs and 46 walks while batting .228.

Tigers vs Mariners Head to Head

• 10/5/2025: 3-2 SEA (Favorite: Tigers, Spread: -1.5, Total: 5.5, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 10/4/2025: 3-2 DET (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -190, Underdog Moneyline: +160)
• 7/13/2025: 8-4 SEA (Favorite: Tigers, Spread: -1.5, Total: 8, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 7/11/2025: 12-3 SEA (Favorite: Tigers, Spread: -1.5, Total: 7, Favorite Moneyline: -290, Underdog Moneyline: +235)
• 4/2/2025: 3-2 SEA (Favorite: Tigers, Spread: -1.5, Total: 6.5, Favorite Moneyline: -124, Underdog Moneyline: +106)
• 4/1/2025: 4-1 DET (Favorite: Mariners, Spread: -1.5, Total: 6.5, Favorite Moneyline: -178, Underdog Moneyline: +150)
• 3/31/2025: 9-6 DET (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 8/15/2024: 2-1 DET (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -136, Underdog Moneyline: +116)
• 8/14/2024: 3-2 DET (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -144, Underdog Moneyline: +122)
• 8/13/2024: 15-1 DET (Favorite: Tigers, Spread: -1.5, Total: 6.5, Favorite Moneyline: -126, Underdog Moneyline: +108)

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