When the Seattle Mariners moved into first place in the AL West early in the season, it came amid a 16-4 run that was punctuated by a six-game win streak.

And when the Mariners took back first place in the division over the weekend, it came thanks to a season-best nine-game win streak.

The numbers behind Mariners’ red-hot September surge

If you’re looking for a common denominator in those Mariners two hot streaks, the bat of Jorge Polanco is an obvious one.

Through Seattle’s first 32 games of 2025, Polanco played in 24 of them and was one of the best hitters in baseball, slashing .395/.434/.816 for a 1.250 OPS with nine home runs, five doubles and 25 RBIs.

And in Polanco’s last 24 games covering mid-August through now, he’s… been one of the best hitters in baseball, slashing .369/.4

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