The Mariners’ next roster puzzle is already coming into focus, and it starts with four young names who all reached the majors in 2026.
Colt Emerson, Kade Anderson, Lazaro Montes and Michael Arroyo each got their first big league look this season, and the results came in very different flavors. Emerson opened with a burst, Anderson finished with a strong stretch, Montes flashed one jaw-dropping blast along with plenty of swing-and-miss, and Arroyo turned in a short but eye-catching run at the plate.
Emerson, 21, came out hot in his first 22 games, hitting .233/.309/.575 with six home runs, five doubles and a triple. The rest of his season was much rougher. Over his final 47 games, he hit .169/.214/.216 with only three extra-base hits before a wrist surgery ended his year.
Anderson, 22, had his bumps early, but he closed on a much better note. He threw seven shutout innings in his penultimate start, then added 3 1/3 scoreless innings in his last outing before a line drive to his left forearm cut the night short.
Montes, 21, gave the Mariners the kind of raw power they’ve been waiting to see. He hit a 474-foot home run, the longest in T-Mobile Park history. But the swing-and-miss concerns were there too, with a 40.7% strikeout rate across 59 plate appearances.
Arroyo, 22, made the strongest statistical impression of the group in a 15-game sample. He hit .371/.439/.514 with one homer and two doubles, and he nearly matched his walks and strikeouts, drawing five walks against six strikeouts.
Those four debuts are now feeding into a bigger question for Seattle: how does the club sort through all of this when 2027 arrives? In a recent conversation on Seattle Sports, Mariners insider Shannon Drayer and Brock and Salk co-host Mike Salk talked through that exact issue and the decisions the team could face with its young talent.
Salk pointed to Arroyo as a possible everyday left fielder once Randy Arozarena departs, but also flagged the risk of leaning too heavily on youth while trying to stay in contention. He raised the same concern with Montes, noting the strikeouts and saying, “he’s not a complete baseball player yet. I hope he ends up getting there.”
He also wondered how the Mariners would handle Emerson after a season that included both bright spots and real struggles, especially with the injury complicating the picture. And if a new manager is stepping in, Salk said he’d likely want veterans in place to steady things.
Drayer’s answer kept coming back to the same reality: the roster will have to be shaped by what is actually available, not just by the wish list. She said the team will have to figure out where these players fit and whether they can coexist with enough veteran support around them.
She also brought up Donovan’s flexibility and the need to settle the shortstop spot early. On Emerson specifically, Drayer said, “I don’t think you start Colt Emerson after finishing the season coming off of a surgery, and he had basically been sent down before that surgery. So, you need to give him a chance to get up and running.”
Still, Drayer liked what she saw from the rookies overall, aside from Emerson’s injury situation. She said they handled themselves well, were comfortable without being careless, and “fit in” with the group. Her bottom line was that Seattle could go with all four if it wanted to, but it would need backup if young players hit the usual rookie bumps.
Salk closed by stressing that the rest of the core would have to carry plenty of weight too. He said the Mariners need a better year from Cal Raleigh, Julio Rodríguez and Josh Naylor, along with a healthy Brendan Donovan, or the whole setup becomes too youth-heavy to work.
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The first taste of Double-A, though, has been less forgiving. Their rankings slid in the latest top 100 refresh as the level of pitching sharpened and the offense backed up, with more strikeouts and less production than they showed before the move. For Seattle, the question now is less about whether the talent is still there and more about how quickly Farmelo and Celesten can adjust to the test that often separates promising names from the ones who stay on track. [Read more 🡒]