Toronto Blue Jays vs. Seattle Mariners Game 4 ALCS Preview: Max Scherzer Faces Luis Castillo – October 16, 2025

Thursday, October 16th, 2025

Toronto Blue Jays at Seattle Mariners: 2025 ALCS Game 4 Preview

The Toronto Blue Jays and the Seattle Mariners face off in a pivotal Game 4 of the American League Championship Series. The Mariners currently lead the best-of-seven series 2-1, putting pressure on the Blue Jays to tie things up at T-Mobile Park.

Game Details

Teams: Toronto Blue Jays (94-68, 1st in AL East) at Seattle Mariners (90-72, 1st in AL West)

Time & Location: Thursday, 7:33 p.m. PT at T-Mobile Park, Seattle

Series Status: Mariners lead 2-1

Weather

Today at T-Mobile Park, expect cool and cloudy conditions with a high near 56°F. There is a 30% chance of light showers, so precipitation could briefly impact play. Winds will be light from the southwest at 6-10 mph, creating minimal effect on fly balls. Overall, dress in layers and watch for occasional dampness during the game.

Pitching Probables

Blue Jays: Max Scherzer (5-5, 5.19 ERA, 1.29 WHIP, 82 strikeouts)

Mariners: Luis Castillo (11-8, 3.54 ERA, 1.19 WHIP, 162 strikeouts)

Odds: Mariners -134, Blue Jays +113; over/under 7.5 runs

Team Breakdown and Season Series

Seattle posted a 90-72 regular season record with an impressive 51-30 mark at home. Power has been their calling card, clubbing 238 home runs—third most in the majors.

Toronto finished the regular season at 94-68, including a 40-41 record on the road. The Blue Jays led the American League with a collective .333 on-base percentage, fueling one of the league’s top offenses.

This Game 4 marks the 10th meeting between the clubs in 2025, with the Blue Jays leading the season series 5-4.

Top Performers

For the Mariners, Josh Naylor has tallied 29 doubles, a triple, and 20 home runs. Jorge Polanco enters on a hot streak, going 10-for-38 with a double and four homers in his last 10 games.

The Blue Jays have delivered a stellar .301 team batting average over their last 10 games, outscoring their opponents by 30 runs and posting a 7-3 record in that span.

Last 10 Games Performance

Mariners: 5-5, .214 batting average, 4.27 ERA, outscored by eight runs

Blue Jays: 7-3, .301 batting average, 4.15 ERA, outscored opponents by 30 runs

Injury Updates

Mariners

Jackson Kowar (shoulder, 15-Day IL), Trent Thornton (achilles, 60-Day IL), Gregory Santos (knee, 60-Day IL), Ryan Bliss (biceps, 60-Day IL)

Blue Jays

Anthony Santander (back, day-to-day), Jose Berrios (elbow, 15-Day IL), Ty France (oblique, 10-Day IL), Bo Bichette (knee, 10-Day IL), Robinson Pina (elbow, 60-Day IL), Nick Sandlin (elbow, 60-Day IL), Yimi Garcia (ankle, 60-Day IL), Bowden Francis (shoulder, 60-Day IL), Ryan Burr (shoulder, 60-Day IL), Angel Bastardo (elbow, 60-Day IL)

In summary

Game 4 of the 2025 ALCS between the Toronto Blue Jays and Seattle Mariners features a thrilling pitching duel between Max Scherzer and Luis Castillo in Seattle. The Mariners look to extend their series lead, while the Blue Jays aim to even up and stay in the hunt for the American League pennant. With both teams showcasing strong lineups and notable recent form, and with potential weather factors coming into play, fans can expect a tightly contested and exciting playoff matchup at T-Mobile Park.

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