The Toronto Blue Jays and Seattle Mariners meet in Game 4 of the ALCS on Thursday, October 16, 2025. The Mariners lead the series 2–1 and will host the game at T-Mobile Park in Seattle, WA. The game is scheduled to start at 8:33 PM and will be broadcast on FS1.

Blue Jays vs. Mariners Betting Prediction

• Money Line Prediction: Seattle Mariners -132. The Mariners have a strong home record of 51-30 and lead the series 2-1. Luis Castillo, with a 3.54 ERA, gives them an edge on the mound.
• Over/Under Prediction: Over 7.5 (-113). Both teams have shown the ability to score, as seen in the previous game with a total of 17 runs. The Blue Jays’ recent offensive surge supports the over.

Team Trends

• The Seattle Mariners lead the ALCS series 2-1 against the Toronto Blue Jays.
• The Toronto Blue Jays have a road record of 40-41 this season.
• In Game 3 of the ALCS, the Toronto Blue Jays won 13-4 against the Seattle Mariners.
• The Seattle Mariners have a home record of 51-30 this season.
• Game 4 will be played at T-Mobile Park in Seattle, WA, with overcast clouds expected.

Blue Jays vs Mariners Preview

The Toronto Blue Jays are set to take on the Seattle Mariners in Game 4 of the ALCS. The Mariners hold a 2–1 series lead and will look to extend their advantage at T-Mobile Park. The game will feature Max Scherzer on the mound for the Blue Jays. Scherzer has a season ERA of 5.19 and a WHIP of 1.29.

On the other side, the Mariners will start Luis Castillo. Castillo has been solid this season with an ERA of 3.54 and a WHIP of 1.19. The game will take place under overcast skies, with mild temperatures and a light breeze. Fans can catch the action on FS1 at 8:33 PM.

Mariners’ Home Field Advantage

The Seattle Mariners have strong hitters in their lineup. Cal Raleigh stands out with 60 home runs, leading both the league and the team. Eugenio Suárez also adds power with 49 home runs, ranking fifth in the league. Luis Castillo takes the mound for the Mariners with an ERA of 3.54. He has 11 wins and 8 losses this season. Castillo’s WHIP of 1.19 is solid, helping the Mariners on the pitching front. The Mariners’ team stats show a batting average of .244, placing them 11th in the league. Their on-base percentage is .319, ranked 7th. They have hit 238 home runs, which is the third highest in the league.

Blue Jays’ Road Performance

The Toronto Blue Jays have some top hitters in their lineup. Vladimir Guerrero Jr. has a batting average of .292 with 23 home runs. He leads the team in both categories. Bo Bichette is another key player, hitting .311 and driving in 94 runs. Addison Barger contributes with 21 home runs and a .243 average. Ernie Clement adds depth with a .277 average. Alejandro Kirk supports the team with a .282 average and 15 home runs. Max Scherzer starts for the Blue Jays with an ERA of 5.19. His WHIP is 1.29, and he has a 5-5 record. The Blue Jays’ team ERA is 4.19, ranked 18th in the league.

Final Betting Pick

The Seattle Mariners are a solid pick for the money line at -132. Their home record of 51-30 shows their strength at T-Mobile Park. With Luis Castillo on the mound, the Mariners have a reliable pitcher with a 3.54 ERA, which can make a difference in this game.

The over 7.5 runs is a good choice for this game. Both teams have shown they can score, as seen in their last game with a combined 17 runs. The Blue Jays’ recent offensive performance, including 18 hits and 5 home runs in their last game, supports the over prediction.

All odds are courtesy of Action247 Sportsbook. Good luck!!

* All odds are provided by Action247 Sportsbook and all odds subject to change. **All views expressed are my own. My picks are my own and are not a guarantee, bet at your own risk. Action247 does not warrant the accuracy of completeness of the information, text, graphics, links or other items contained within these post.