Blue Jays vs Mariners Prediction, Odds, Moneyline, Spread & Over/Under for ALCS Game 1 on Oct. 12

Odds updated as of 4:12 a.m.

The MLB slate on Sunday includes the Toronto Blue Jays taking on the Seattle Mariners in Game 1 of the ALCS.

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

Blue Jays vs Mariners Game Info

• Toronto Blue Jays (94-68) vs. Seattle Mariners (90-72)
• Date: Sunday, October 12, 2025
• Time: 8:03 p.m. ET
• Venue: Rogers Centre -- Toronto, Ontario
• Coverage: FOX

Blue Jays vs Mariners Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: TOR: (-166) | SEA: (+140)
• Spread: TOR: -1.5 (+120) | SEA: +1.5 (-144)
• Total: 8 -- Over: (-105) | Under: (-115)

Blue Jays vs Mariners Probable Starting Pitchers

Probable Pitchers: Kevin Gausman (Blue Jays) - 10-11, 3.59 ERA vs Bryce Miller (Mariners) - 4-6, 5.68 ERA

The Blue Jays will look to Kevin Gausman (10-11, 3.59 ERA) versus the Mariners and Bryce Miller (4-6, 5.68 ERA). When Gausman starts, his team is 16-17-0 against the spread this season. Gausman's team is 8-10 this season when he starts and they are the moneyline favorite. The Mariners have a 7-12-0 record against the spread in Miller's starts. The Mariners have a 2-5 record in Miller's seven starts this season when they were the moneyline underdog.

Blue Jays vs Mariners Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (52.6%)

Blue Jays vs Mariners Moneyline

• Toronto is the favorite, -166 on the moneyline, while Seattle is a +140 underdog on the road.

Blue Jays vs Mariners Spread

• The Mariners are +1.5 on the run line against the Blue Jays. The Mariners are -144 to cover, and the Blue Jays are +120.

Blue Jays vs Mariners Over/Under

• An over/under of 8 has been set for Blue Jays-Mariners on Oct. 12, with the over being -105 and the under -115.

Bet on Toronto Blue Jays vs. Seattle Mariners on FanDuel today!

Blue Jays vs Mariners Betting Trends

• The Blue Jays have come away with 50 wins in the 84 contests they have been listed as the favorites in this season.
• Toronto has a record of 21-5 in contests when bookmakers favor them by -166 or more on the moneyline.
• Contests with the Blue Jays have gone over the total set by oddsmakers in 89 of 164 chances this season.
• In 164 games with a line this season, the Blue Jays have a mark of 94-70-0 against the spread.
• The Mariners have won 20 of the 42 games they were the underdog on the moneyline this season (47.6%).
• Seattle has a 3-3 record (winning 50% of its games) when playing as a moneyline underdog of +140 or longer.
• The Mariners have played in 161 games with a set over/under, and have combined with opponents to go over the total 86 times (86-70-5).
• The Mariners are 72-89-0 against the spread this season.

Blue Jays Player Leaders

• Vladimir Guerrero Jr. is batting .292 with 34 doubles, 23 home runs and 81 walks. He has an on-base percentage of .381 and a slugging percentage of .467.
• He ranks 12th in batting average, sixth in on-base percentage, and 41st in slugging among all qualified hitters in baseball.
• Guerrero will look for his sixth straight game with a hit in this contest. In his last five games he is batting .455 with three home runs, two walks and 10 RBIs.
• George Springer leads Toronto with 153 hits and an OBP of .397 this season. He's batting .307 and slugging .556.
• Among qualifying hitters, his batting average places him fourth, his on-base percentage second, and his slugging percentage fifth.
• Ernie Clement has 151 hits this season and has a slash line of .277/.313/.398.
• Clement enters this matchup with three games in a row with at least one hit. During his last five outings he is hitting .588 with a double, a home run, a walk and five RBIs.
• Alejandro Kirk has 15 home runs, 76 RBI and a batting average of .282 this season.

Mariners Player Leaders

• Cal Raleigh has 147 hits with a .359 on-base percentage, leading the Mariners in both categories. He's batting .247 and slugging .589.
• Including all the qualified players in MLB, he ranks 98th in batting average, 20th in on-base percentage and third in slugging percentage.
• Raleigh heads into this game on a six-game hitting streak. During his last 10 games he is hitting .333 with three doubles, three home runs, six walks and eight RBIs.
• Julio Rodriguez paces his team with a .474 slugging percentage. He has a batting average of .267 with an on-base percentage of .324.
• He is currently 44th in batting average, 88th in on-base percentage and 38th in slugging percentage among all qualifying hitters.
• Josh Naylor is hitting .295 with 29 doubles, a triple, 20 home runs and 48 walks.
• Eugenio Suarez is batting .228 with 28 doubles, 49 home runs and 46 walks.

Blue Jays vs Mariners Head to Head

• 5/11/2025: 9-1 TOR (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -184, Underdog Moneyline: +154)
• 5/10/2025: 6-3 TOR (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -138, Underdog Moneyline: +118)
• 5/9/2025: 6-3 TOR (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -152, Underdog Moneyline: +128)
• 4/20/2025: 8-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 4/19/2025: 8-4 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 4/18/2025: 3-1 TOR (Favorite: Blue Jays, Spread: -1.5, Total: 8, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 7/7/2024: 5-4 TOR (Favorite: Mariners, Spread: -1.5, Total: 7, Favorite Moneyline: -148, Underdog Moneyline: +126)
• 7/6/2024: 5-4 TOR (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -108, Underdog Moneyline: -108)
• 7/5/2024: 2-1 SEA (Favorite: Mariners, Spread: -1.5, Total: 7.5, Favorite Moneyline: -134, Underdog Moneyline: +116)
• 4/10/2024: 6-1 SEA (Favorite: Blue Jays, Spread: -1.5, Total: 8.5, Favorite Moneyline: -118, Underdog Moneyline: -100)

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