Seattle Mariners at Toronto Blue Jays Picks and Predictions for Sunday, October 12, 2025

By: David Anicetti Published 10/12/2025, 12:00 AM ET

The Seattle Mariners visit the Toronto Blue Jays on Sunday for Game 1 of the best-of-seven American League Championship Series at Rogers Centre, starting at 8:03 PM ET on FOX. Seattle reached the ALCS after beating Detroit in five games, while Toronto advanced by defeating the New York Yankees in four. Use our free MLB picks to build your bankroll in this ALCS.

Seattle Mariners Preview

Seattle’s offense has been streaky this postseason. The Mariners are batting .207 through five playoff games with six home runs and 17 runs driven in. Cal Raleigh has been the most reliable hitter, going 8-for-21 (.381) with a homer and four RBI. Jorge Polanco has two home runs, while Julio Rodríguez and J.P. Crawford have each added one.

Strikeouts have hurt Seattle’s run production, with 58 Ks through five games, but the starting rotation and bullpen have kept the Mariners in most games. The 15-inning win over Detroit showed how steady the relievers can be when games are on the line. Andrés Muñoz and Matt Brash have helped limit runs in key spots, giving the Mariners a chance even when the bats go cold. Seattle has not yet announced its starting pitcher for Game 1 on Sunday.

Toronto Blue Jays Preview

Toronto’s hitters have performed well at the plate during the postseason. The Blue Jays are batting .338 in four postseason games with nine home runs and 33 RBI. Vladimir Guerrero Jr. has been the leader, hitting .529 with three home runs and nine RBI. Daulton Varsho has added a .438 average and two homers, and Ernie Clement has nine hits while batting .643.

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The Blue Jays have turned nearly every at-bat into pressure for opponents. They topped 10 runs twice against the Yankees and showed strong contact all through the lineup. The mix of power and line drives is made for Rogers Centre, where balls carry and get into gaps quickly. Toronto has not yet announced its starting pitcher for Game 1 on Sunday.

Seattle Mariners vs Toronto Blue Jays Prediction

Toronto’s lineup is hot and has played well during the regular season and playoffs at home. Seattle’s pitching can keep it close early, but the Blue Jays’ bats are producing better and will help Toronto win Game 1 at home on Sunday. Final Score Prediction: Toronto Blue Jays win 5–3.