Inside The Mariners

Seattle Mariners Are One of Just Five American League Teams to Accomplish This Feat So Far

The Mariners are one of the few teams in the entire American League with a positive run differential, showing how mediocre the league has been in the first month.
Seattle Mariners left fielder Randy Arozarena celebrates after hitting a two-run single against the Toronto Blue Jays on April 20 at Rogers Centre.
Seattle Mariners left fielder Randy Arozarena celebrates after hitting a two-run single against the Toronto Blue Jays on April 20 at Rogers Centre. | Dan Hamilton-Imagn Images

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It's still early in the season, but the Seattle Mariners are in the midst of their best stretch of baseball in 2025.

The Mariners clinched their fourth consecutive win against the Toronto Blue Jays on Sunday. They improved to 9-3 in their last 12 games with an 8-3 against the Blue Jays and now have a 12-10 recrd. Their last four series have consisted of wins against the Houston Astros and a sweep of the Texas Rangers — both American League West rivals — and series wins against the Cincinnati Reds and Toronto, respectively.

Seattle will look to make it five consecutive series wins when they start a new series against the Boston Red Sox at 3:45 p.m. PT on Tuesday. The Mariners will also have a chance to continue to pace the AL West in an incredible stat.

Entering Tuesday, Seattle has a +5 run differential, tying them with the Astros atop the division. The M's are one of just five American League teams with a positive run differential.

If the playoffs were to start Tuesday, Seattle would have the second Wild Card spot in the American League (No. 5). The team is 1.5 games behind the Detroit Tigers and New York Yankees, who are tied for the No. 1 seed at 14-9.

The AL has been viewed as wide open for most of the season. And if the first 22 games are an indication for how the rest of the year will go, the Mariners will be right in the thick of the playoff race down to the very end.

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