The Cardinals claimed Peralta off waivers from the Rockies on Monday.
The younger brother of Freddy Peralta, Luis has spent all of this season at Triple-A Albuquerque, where he's been bludgeoned for 14 runs with a 14:13 K:BB over 7.1 frames. The left-hander has collected a 6.03 ERA and 30:23 K:BB in 31.1 innings during his chances at the big-league level. Peralta boasts a 30.2 percent strikeout rate in the minors but also a 13.9 percent walk rate. He will report to Triple-A Memphis.
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Rockies' Luis Peralta: DFA'd by Colorado
Rotowire
The Rockies designated Peralta for assignment Tuesday.
The left-hander missed out on Colorado's Opening Day roster and is now losing his place on the 40-man roster after surrendering 14 earned runs with a 14:13 K:BB over 7.1 innings with Triple-A Albuquerque this season. Peralta also struggled in the big leagues last year with a 9.47 ERA and 2.32 WHIP in 22 appearances.
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Rockies' Luis Peralta: Misses out on roster spot
Rotowire
Colorado optioned Peralta to Triple-A Albuquerque on Sunday, Patrick Lyons of JustBaseball.com reports.
The left-hander finished 2025 working in the majors but is set to open 2026 in the minor leagues. Peralta had a 9.47 ERA and 16:18 K:BB across 19 frames in the big leagues last year, and he wasn't much better at Triple-A with a 9.09 ERA.
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Rockies' Luis Peralta: Activated Wednesday
Rotowire
The Rockies reinstated Peralta (hip) from the injured list Wednesday.
Left hip inflammation sent Peralta onto the injured list Sept. 11, but a quick recovery will allow him to provide depth to Colorado's bullpen for the final several games of the 2025 campaign. Ryan Rolison was optioned to Triple-A Albuquerque in a corresponding move.
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Rockies' Luis Peralta: Up with big club
Rotowire
The Rockies recalled Peralta from Triple-A Albuquerque on Sunday.
The left-hander opened the season with the Rockies and had a 7.56 ERA in nine appearances before being demoted April 20. Peralta is now back in the majors despite posting an even worse 9.09 ERA over 34.2 innings at Triple-A.
