The Mariners have been firing on all cylinders. After more than two decades, Ken Griffey Jr.'s single-season home run record is finally broken and the squad recently went on a 10-game win streak. They have won 13 out of 14 overall.
Now two games ahead of the Astros in the standings, the Mariners have a 91.2 percent chance to win the AL West for the first time since 2001, according to FanGraphs. Things are looking up and it's thanks to several players on the roster getting hot at the right time.
While Seattle is now comfortably in a playoff position, not everyone has been contributing as much as others this month. If the team wants to make a deeper postseason run and maximize their championship equity, these players will need to put their foot on the gas a little more.
Mariners need 2 hitters to heat up before October arrives
Eugenio Suárez
The Mariners' big acquisition of the trade deadline hasn't panned out quite as well as many hoped. Suárez brought high expectations and a very respectable 141 wRC+ with him to Seattle, but his numbers ever since have been a far cry from what he accomplished in Arizona.
Since suiting up for his old team, he has managed just a 94 wRC+ with a .262 on-base percentage. His 11 homers and seven doubles suggest that his power is still there but his 35.1 strikeout rate indicate that old habits die hard when it comes to plate discipline.
MY GOODNESS, GENO 😮
— MLB (@MLB) September 20, 2025
Eugenio Suárez hits this baseball OVER the train tracks 👀 pic.twitter.com/Q5yFflIxal
He has had some big moments lately, including a four-hit performance against the Royals, but it's a lack of consistency that has kept him from returning to his pre-trade deadline peak. In September, he has been striking out slightly more, but still driving the ball when he does manage to barrel up a pitch, so unless the Mariners are content with this feast-or-famine approach at the plate, some adjustments will need to be made.
Randy Arozarena
Arozarena has been one of the most valuable members of the team this season, posting a 120 wRC+ with 2.8 fWAR. He has hit more runs (27) this year than any other in his career, has stolen 28 bases, and has even made significant defensive improvements in the outfield.
However, since being moved to the top spot in the lineup, he has seen his offensive production suffer. His OPS for the season as a leadoff hitter is just .633 compared to his .768 season OPS. In the month of September, he's slashing just .183/.306/.239 for a 70 wRC+.
Randy Arozarena turns a deficit into a lead with one big swing! pic.twitter.com/xvBedytgnh
— MLB (@MLB) September 10, 2025
It's unclear whether Dan Wilson will continue to slot Arozarena in the same position in the lineup come October, but the data suggests it's a bad idea. He played his best while batting in the heart of the order and he has immense offensive upside that has come out only sparingly as of late.
Having Randy in his full form would be a major boon for the Mariners. Even if they haven't needed it recently, they'll need it in a playoff series.
