Cardinals Claim Luis Peralta

The Cardinals have claimed left-hander Luis Peralta off waivers from the Rockies, according to announcements from both clubs. Colorado designated him for assignment last week. The Cards had an open 40-man spot and have optioned Peralta to Triple-A Memphis, so no corresponding moves are necessary.

Peralta, 25, is the younger brother of Freddy Peralta. The younger sibling was a starter earlier in his career but got moved to a relief role when he was a minor leaguer with the Pirates. He showed tremendous promise in that role in 2024, the year he was traded to the Rockies in a one-for-one swap for Jalen Beeks.

Between the two clubs, he tossed 47 2/3 minor league innings that year, allowing only 0.94 earned runs per nine. He did give out walks at a high rate of 11.2% but his 40.1% strikeout rate was massive and his 48.8% ground ball rate above average as well. He also got to make his big league debut and put up a 0.73 ERA in 12 1/3 innings.

Things have been going downhill since then, however. He had a 9.47 ERA in the majors last year and a 9.09 ERA at the Triple-A level. For Albuquerque, his 28% strikeout rate was still pretty good but his 15.4% walk rate way too high. In the majors, things were even worse, as his ghastly 17.8% walk rate was higher than his 15.8% strikeout rate. He began 2026 back at Triple-A but but allowed 14 earned runs in 7 1/3 innings while walking 13 opponents.

His velocity is down a bit as well. His four-seamer averaged 95 miles per hour in 2024 but dropped about half a tick last year and is now down to 93.5 miles per hour so far in 2026. His curveball and changeup have had similar drops.

The Rockies eventually gave up. Perhaps that’s because the new front office is less enamored of Peralta but it’s hard to fault them when looking at Peralta’s recent numbers. For the Cards, despite a 14-13 record at the moment, they have long planned for 2026 to be an evaluation year. They are less focused on immediate contention and more worried about long-term development.

They’ve had an open roster spot since Jared Shuster was designated for assignment two weeks ago. They are using that today to grab Peralta. Obviously, Peralta’s stock is down at the moment, but the Cards will see if there’s a path to getting him back to that 2024 form. Peralta can be optioned for the remainder of this year and one additional season as well. If things click, he has less than a year of service time, meaning he could be affordably controlled for years into the future.

Photo courtesy of Kirby Lee, Imagn Images