Toronto Blue Jays vs Seattle Mariners Odds Preview

The stage is set for Toronto Blue Jays vs Seattle Mariners at T-Mobile Park in Seattle, WA on October 15, 2025, as Game 3 of the ALCS shifts back to Seattle. After the Mariners took a commanding 2-0 series lead in Toronto, they’ll look to capitalize on home field advantage, while the Blue Jays fight to stay alive in their pursuit of a maiden World Series berth.

Moneyline opened at Mariners -145 and Blue Jays +125, now the Mariners are -135 and the Blue Jays are +115. The run line opened at -1½ -110 for Seattle but has shifted to -1½ +162, reflecting significant backing for Toronto. The over under opened at o7 -110, and the under is currently u7 -120, signaling confidence in a low-scoring contest.

These betting lines and odds movements offer valuable insights into public sentiment and sharp money influence. Seattle’s pitching staff has allowed just three runs through two contests, pushing the run line move and suggesting value on the Blue Jays. Seattle’s bullpen posted a 1.50 ERA through two games, which supports expectations for a lower-scoring affair. Monitoring such shifts helps bettors gauge momentum and structure data-driven wagers.

The ALCS is broadcast on FOX and Fox Sports 1. See full full MLB markets for more options. Ready to bet smarter? Start your OddsTrader Turbo subscription now or place your wager with a U.S. regulated sportsbook before first pitch. The best run line pricing of -1½ +162 is available at Caesars.