The No. 9 prospect in baseball (per MLB Pipeline) and the top prospect in the Seattle Mariners farm system, infielder Colt Emerson, entered this spring with an opportunity to make the team's Opening Day roster.

MLB Pipeline senior writer Jim Callis expects Seattle Mariners prospects Kade Anderson and Rylan Sloan to make an impact soon.

Even after acquiring Brendan Donovan, the Seattle Mariners have one of baseball’s best farm systems, headlined by three top 30 prospects and five in the preseason top 100.

Despite the 2025 graduation of top prospect Cole Young and the trades of top prospects Harry Ford and Jurrangelo Cijntje this offseason, the Seattle Mariners were still given a very healthy farm system ranking from MLB Pipeline on Thursday night.

Ryan Sloan’s dominant Spring Breakout outing gave Mariners fans another thrilling look at why the young right-hander is becoming one of Seattle’s most exciting pitching stories.

Though he's likely still a couple of seasons away from the Major Leagues, Mariners prospect Korbyn Dickerson has impressed team management in a very short amount of time. He's being viewed as one of the special pieces of Seattle's blossoming farm system ...

After a heartbreaking 2025 ALCS exit, the Seattle Mariners eye a 2026 World Series run. Explore storylines on Josh Naylor, Brendan Donovan, and top prospects.