The Cubs outrighted Peralta to Triple-A Iowa on Wednesday.
Over the weekend, the Cubs became the third organization to designate Peralta for assignment in 2026. The 25-year-old lefty was scooped up off waivers on the previous two occasions, but after going unclaimed this time around, he'll stick around in the Cubs organization but will no longer be part of the 40-man roster. Peralta has posted a 4.70 ERA, 1.76 WHIP and 21:16 K:BB over 15.1 innings at Iowa since the Cubs claimed him May 3.
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Cubs' Luis Peralta: Bumped from 40-man roster
Rotowire
The Cubs designated Peralta for assignment Saturday, Bruce Levine of 670TheScore.com reports.
Peralta was brought in last month via a waiver claim but will now give up his 40-man spot to right-hander Jayden Murray, whom the Cubs acquired in a trade with the Astros. The left-handed Peralta has put up a 4.70 ERA and 1.76 WHIP in 15.1 innings with Triple-A Iowa since joining the organization.
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Cubs' Luis Peralta: Claimed by Cubs, sent to Triple-A
Rotowire
The Cubs claimed Peralta off waivers from the Cardinals on Sunday and optioned him to Triple-A Iowa, Taylor McGregor of Marquee Sports Network reports.
Peralta was designated for assignment by the Cardinals on Friday but quickly found a home in a new organization willing to dedicate a 40-man roster spot to him. The southpaw never made an appearance in the Cardinals organization, but he posted an inflated 17.18 ERA and 3.24 WHIP with 14 strikeouts over 7.1 innings in six appearances with the Rockies' Triple-A affiliate in Albuquerque this season. Peralta has the ability to punch out batters, but he'll need to greatly limit the damage against him at Iowa before receiving a look in Chicago's bullpen.
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Cardinals' Luis Peralta: Designated for assignment
Rotowire
The Cardinals designated Peralta for assignment Friday.
Peralta was claimed earlier this week, but he's now headed back to waivers without having made an appearance in the Cardinals organization. The transaction clears a spot on the 40-man roster for the addition of Jared Shuster.
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Cardinals' Luis Peralta: Claimed by Cardinals
Rotowire
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: 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.
