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

Odds updated as of 2:13 a.m.

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

Here's what you need to know before checking out today's MLB odds and spreads on FanDuel Sportsbook.

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: (-120) | SEA: (+102)
• Spread: DET: +1.5 (-205) | SEA: -1.5 (+168)
• 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 probable starters are Casey Mize (14-6, 3.87 ERA) for the Tigers and Bryce Miller (4-6, 5.68 ERA) for the Mariners. Mize's team is 16-12-0 against the spread this season in his starts. Mize's team has won 66.7% of his starts when they are favored on the moneyline (12-6). The Mariners have gone 7-11-0 ATS in Miller's 18 starts with a set spread. The Mariners have a 2-5 record in Miller's seven starts this season when they were the underdog on the moneyline.

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

• Detroit is the favorite, -120 on the moneyline, while Seattle is a +102 underdog on the road.

Tigers vs Mariners Spread

• The Mariners are 1.5-run favorites against the spread for this matchup with the Tigers. The Mariners are +168 to cover, while the Tigers are -205 to cover as a 1.5-run underdog on the runline.

Tigers vs Mariners Over/Under

• Tigers versus Mariners on Oct. 8 has an over/under of 8.5 runs, with the odds on the over -105 and the under set at -115.

Bet on Detroit Tigers vs. Seattle Mariners on FanDuel today!

Tigers vs Mariners Betting Trends

• The Tigers have been favorites in 107 games this season and have come away with the win 59 times (55.1%) in those contests.
• This season Detroit has come away with a win 54 times in 96 chances when named as a favorite of at least -120 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 that had a posted line this season.
• The Mariners have won 19 of the 41 games they were the underdog on the moneyline this season (46.3%).
• Seattle has a 17-14 record (winning 54.8% of its games) when playing as a moneyline underdog of +102 or longer.
• The Mariners have played in 159 games with a set over/under, and have combined with opponents to go over the total 85 times (85-69-5).
• The Mariners have a 71-88-0 record ATS this season (covering 44.7% of the time).

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.
• He ranks 77th in batting average, 23rd in on-base percentage, and 118th in slugging among all qualifying hitters in baseball.
• Torres will look for his sixth straight game with a hit in this matchup. In his last five games he is hitting .286 with two doubles and a walk.
• Riley Greene leads Detroit in slugging percentage (.493) and total hits (155) this season. He's batting .258 with an on-base percentage of .313.
• His batting average ranks 69th among qualified players, his on-base percentage 104th, and his slugging percentage 21st.
• Spencer Torkelson has 135 hits this season and has a slash line of .240/.333/.456.
• Torkelson takes a two-game hitting streak into this game. In his last five games he is batting .158 with two doubles, three walks and five RBIs.
• Zach McKinstry has 12 home runs, 49 RBI and a batting average of .259 this season.

Mariners Player Leaders

• Cal Raleigh has 147 hits with a .359 on-base percentage, leading the Mariners in both statistics. He's batting .247 and slugging .589.
• Including all qualified players in MLB, he is 98th in batting average, 20th in on-base percentage and third in slugging percentage.
• Raleigh brings a four-game hitting streak into this game. During his last five outings he is batting .350 with a double, a home run, two walks and three RBIs.
• Julio Rodriguez leads his team with a .474 slugging percentage. 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 hitting .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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