Baseball America Re-Ranks Seattle Mariners' Top-10 Prospects with Interesting Twist

After advancing to Game 7 of the American League Championship Series in 2025, the present looks pretty good for the Seattle Mariners.

But with one of the best – and deepest – farm systems in baseball, the future also looks pretty good.

And Baseball America took an in-depth look at that future on Wednesday morning, as they released their Top-10 Mariners prospects heading into spring training.

Twenty-year-old Colt Emerson is ranked as the No. 1 prospect in the organization, and he’s expected to challenge for the Opening Day spot at third base. A first-round pick in 2023, Emerson hit .285 across three levels in 2025, but he’s played just 40 games above High-A ball.

He’s a solid contact hitter who continues to grow into his power. He looks like the shortstop of the future for Seattle, and that could come as early as 2027, when J.P. Crawford is a free agent.

Kade Anderson, taken No. 3 in the 2025 draft out of LSU, comes in at No. 2. He has yet to throw a professional pitch since getting drafted, but watching him will be one of the biggest storylines at spring training for Seattle.

The Mariners have said they aren’t going to trade from their starting pitching depth this offseason, so there doesn’t appear to be any immediate rush on getting Anderson to the big leagues, but he could push for a roster spot late in the season, and certainly in 2027.

BA ranks hard-hitting outfielder Lazaro Montes as the No. 3 prospect in the organization, while bumping up pitcher Ryan Sloan to No. 4.

Montes ended the season at Double-A Arkansas and could push for a promotion later in 2026, while Sloan ended the year at High-A Everett.

Michael Arroyo, who is now moving to left field, is in at the No. 5 spot, and outfielder Jonny Farmelo is ranked No. 6. Switch-pitcher Jurrangelo Cijntje is in at No. 7. He also ended the year at Double-A Arkansas, and could be an option for the Mariners some time in 2026.

The real surprise for the M’s comes at the bottom, as recently-drafted catcher Luke Stevenson gets the No. 8 spot. He hit .280 at Single-A Modesto through 22 games after getting drafted, and with Harry Ford now traded from the organization, his development will be key.

The Mariners are likely to go with a short-term backup catcher at the big-league level this season, but eventually, Stevenson will pair with Cal Raleigh on the major league roster.

Felnin Celesten, who is listed as a Top-100 prospect by MLB Pipeline, fell to No. 9 in the Baseball America rankings. Also just 20 years old, he hit .273 in 104 games in 2025, playing at Single-A and High-A.

Outfielder Tai Peete comes in at No. 10.

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Baseball America Re-Ranks Seattle Mariners’ Top-10 Prospects with Interesting Twist

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