Seattle Mariners Send Hard-Throwing Rookie to Triple-A in Major Roster Move

The Mariners announced on Monday that they are calling up left-hander Brandyn Garcia and sending down Juan Burgos.

Seattle Mariners relief pitcher Juan Burgos (67) pitches to the Kansas City Royals during the eighth inning at T-Mobile Park on July 1. | Steven Bisig-Imagn Images

The Seattle Mariners made a notable roster move on Monday, announcing that they have promoted highly-rated pitching prospect Brandyn Garcia to the big league roster and sent Juan Burgos back to Triple-A Tacoma.

Garcia, 25, is the No. 13 prospect in the organization, per MLB Pipeline. He was an 11th-round pick in the 2023 draft out of Texas A&M and has gone 5-4 with a 3.51 ERA between Double-A and Triple-A. He made eight appearances at Tacoma, going 1-0 with a 2.16 ERA, which is stellar for the hitter-friendly PCL.

Mariners are calling up lefty reliever Brandyn Garcia from Tacoma.

Rookie RHP Juan Burgos optioned back to Triple-A.

— Adam Jude (@A_Jude) July 21, 2025

It's unclear if he's here for the long haul or not, but the M's did need bullpen relief after exhausting their 'pen in a weekend series with the Houston Astros. Burgos pitched two innings in Sunday's 11-3 loss. Though he's not rated among the team's Top 30 prospects, per MLB Pipeline, he's generally showed well in limited action. He's struck out eight in 6.2 innings, pitching to a 4.05 ERA. He's also 25 years old.

The Mariners are in need of impact bullpen arms as they chase their first playoff berth since 2022. While it's unfair to put that expectation on Garcia, he does have impact stuff. His fastball can hit the upper-90s, and he'll give the Mariners another lefty to pair with Gabe Speier.

▶️ From a stuff standpoint, No. 15 prospect LHR Brandyn Garcia is MLB ready. Overall, the strike rate is good enough (65% since landing in TAC), the slider misses bats at a high rate, & he's 95-99, getting to 97-98 often.

The BB% is too high at nearly 13%, but ... pic.twitter.com/F9eB22y8av

— Jason A. Churchill (@ProspectInsider) July 20, 2025

Burgos could make his way back to the bullpen as well at some point through the rest of the year.

The Mariners are 53-46 and four games back of the Houston Astros in the American League West. They'll take on the Brewers on Monday at 6:40 p.m. PT.

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