Mariners Promote Top Prospects to Triple‑A

Top Talent Moves to Tacoma

Seattle has elevated two of its blue‑chip prospects, Lazaro Montes and Michael Arroyo, to Triple‑A Tacoma. The 21‑year‑old outfielder, a 6‑foot‑5 slughter and the club’s No. 3 prospect, topped a red‑hot June that earned him Texas League Player of the Month honors. Montes posted a .234/.369/.550 line with 65 hits and 66 RBI after 79 games at Double‑A Arkansas and now leads the Mariners system with 25 home runs.

Montes’ power surge was highlighted by June’s 12 home runs, 30 RBI and a 1.199 OPS, which catapulted him to No. 26 overall in MLB Pipeline’s rankings. His overall average sits at .234 with a .550 slugging percentage, far higher than his debut season numbers. The 25 homers already place him atop the franchise’s prospect list for power.

Arroyo, also 21, splits time between second base and left field after signing as a shortstop with Seattle. The dual‑position infielder posted a .287/.364/.456 slash with 10 home runs and 13 steals in 65 Double‑A contests. His defensive flexibility is especially valuable as the club recently promoted interior‑infield prospects Cole Young (2025) and Colt Emerson (2026), reshaping the pipeline.

The organization’s player‑development department announced the promotions on Monday via X, confirming the immediate impact on the Tacoma roster. The Triple‑A squad opens a six‑game road trip in Las Vegas on Tuesday, slated for a 7:05 p.m. first pitch at Las Vegas Ballpark.

Looking ahead, both prospects are poised to add depth for Seattle’s outfield and infield needs. Montes’ 25 home runs already make him the most prolific power threat in the system, positioning him as a potential major‑league contributor when roster spots open. Arroyo’s ability to guard multiple positions reduces defensive mismatches as the Mariners cycle through a slew of young infielders. The aggressive promotions signal confidence in a farm system that continues to churn out top‑level talent.

What It Means for Seattle’s Future

With Montes and Arroyo climbing, Seattle gains two immediate depth pieces for its struggling outfield and infield. Montes’ 25 home runs already make him the most prolific power threat in the system, positioning him as a possible addition when the Giants or Astros thin out their rosters. Arroyo’s ability to guard multiple positions reduces the risk of defensive mismatches as the Mariners rotate through a slew of young infielders.

The timing aligns with the recent promotions of Cole Young and Colt Emerson, suggesting the club is building a cohesive, multi‑talent infield core. As the Triple‑A squad heads to Las Vegas, fans will watch whether these promoted prospects can maintain their season pace against higher‑level competition.