The Seattle Mariners have built not only a contender at the major-league level but also one of baseball’s most exciting pipelines. As Baseball America releases its 2026 top-10 Mariners prospects, fans have plenty to be optimistic about — from advanced hitters ready to make an impact soon to intriguing, high-ceiling arms that could emerge as future stars.
Topping the Mariners’ prospect list is shortstop Colt Emerson, widely regarded as the organization’s crown jewel. Emerson’s advanced offensive profile and all-around approach at the plate make him one of baseball’s most promising young hitters. Baseball America projects him as a future core bat for Seattle, with the ability to impact the lineup on contact, power, and plate discipline.
Second on the list is Cole Young, a polished infielder capable of helping the Mariners both offensively and defensively. Young’s ability to get on base, combined with his speed and feel for contact hitting, gives him a strong chance to contribute early at the big-league level. He’s viewed as a future everyday player who could slot into second base or another up-the-middle role for Seattle.
Emerging outfield prospect Lazaro Montes brings a powerful left-handed bat to Seattle’s system. Seen as one of the best power prospects in the organization, Montes has tools that could play up in the major leagues, especially if he continues to refine his approach against advanced pitching. His speed and athleticism add further appeal.
Another outfield star in the system, Jonny Farmelo combines batting ability with athleticism, making him a dynamic everyday option down the line. Farmelo’s performance in the minors has showcased a balanced offensive approach — enough power to drive runs with the patience to set the table. His skill set gives the Mariners flexibility in roster construction as he develops.
Michael Arroyo, a second baseman with a strong feel for the strike zone, enters 2026 as one of Seattle’s more polished prospects. Arroyo’s contact skills and on-base instincts stand out, and if he adds a bit more power, he could become a reliable contributor near the top of Seattle’s batting order.
Shortstop Felnin Celesten is one of the more intriguing tools-based prospects in the Mariners’ Top 10. A switch-hitter with power potential and baserunning prowess, Celesten has shown flashes of upside, though health and consistency have been challenges. If he can put it all together, Celesten could emerge as a star up the middle.
The Mariners’ Top 10 also features a truly unique arm in Jurrangelo Cijntje, a switch-pitcher capable of throwing from both the left and right sides. While it’s expected he’ll focus on whichever arm gives him the best results long-term (likely right-handed, where he has upper-90s velocity), his athleticism and strikeout ability give Seattle an intriguing future bullpen or even rotation option.
Catcher Luke Stevenson, selected in the 2025 draft, instantly made an impact in Single-A with a strong offensive showing. Baseball America ranked Stevenson in Seattle’s top 10 prospects, citing his hitting ability from a premium defensive position. As catchers who can hit are rare, Stevenson’s development will be closely watched.
Tai Peete continues to climb Seattle’s prospect rankings after a season highlighted by significant power production. A former shortstop who converted to the outfield, Peete’s presence adds depth and potential future pop for the Mariners’ outfield rotation as he continues refining his approach.
Rounding out the top 10 is Ryan Sloan, a right-handed pitcher noted for his frame and projection. Sloan’s arsenal and command improvements have scouts excited about his future, and though he’s still early in his developmental arc, he could become a key piece of Seattle’s pitching depth in the years ahead.
The Mariners’ farm system isn’t just deep — it’s diverse in talent, spanning power bats, contact hitters, catchers with rare offensive ability, and unique pitching prospects. By Baseball America’s count, many of these players are already on MLB Pipeline’s top-100 lists, signaling strong major-league potential.
Players like Emerson, Young, and Farmelo could help sustain Seattle’s competitive window even as veterans handle the present lineup. And unique talents like Cijntje and Stevenson give the Mariners flexibility in constructing rosters that can adapt to future needs.
While not all prospects will reach star status, Baseball America’s rankings make clear that Seattle’s future remains bright — and that the club’s prospect development efforts could soon pay dividends at T-Mobile Park and beyond.
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