Cardinals sign Phil Maton

The Cardinals announced this morning that they’ve signed right-hander Phil Maton to a one-year, major league deal, as noted by Derrick Goold of the St. Louis Post-Dispatch. The financial terms of the deal have not yet been disclosed. Left-hander Bailey Horn was designated for assignment to make room for Maton on the club’s 40-man roster, as noted by Katie Woo of The Athletic.

Maton, 32 later this month, was among the better relief arms still available on the free agent market at this late point in the calendar. Drafted in the 20th round by the Padres back in 2015, Maton will suit up with the Cardinals for his ninth MLB season and hope to continue a stretch of quality work that began with the Astros back in 2022. The first five seasons of Maton’s career saw him struggle despite solid peripherals, with a subpar 4.76 ERA in 215 1/3 innings of work across 209 appearances. He struck out 26.4% of opponents during that time while walking 9.2%. Those numbers were decent enough to keep Maton rostered with San Diego and Cleveland over the years, but he eventually wound up in Houston late in the 2021 season.

The righty’s middling results continued with the Astros through the end of 2021, but by the start of the 2022 season a switch seemed to have flipped. His 25.2% strikeout rate and 8.2% walk rate over the past three seasons aren’t markedly different than what they were earlier in his career, but the veteran’s results have improved drastically as he’s posted a 3.50 ERA with a 4.11 FIP in 195 2/3 innings of work across 206 games. After hitting free agency for the first time in his career prior to the 2024 season, Maton signed on with the Rays but struggled badly for the club, with a 4.58 ERA in 40 appearances for them last year. Fortunately for the right-hander, however, he was traded to the Mets for the stretch run and turned a corner, dominating to the tune of a 2.51 ERA across his final 31 appearances of the regular season.

Now, Maton is headed to St. Louis as the first and perhaps only major-league free agent signing the club will make this offseason. The club’s plans for the winter were largely hamstrung by an inability to find a trade partner for veteran third baseman Nolan Arenado, resulting in an extremely quiet offseason for the club that was defined most by the departures of key veterans like Paul Goldschmidt in free agency. Despite the club’s lack of activity this offseason, the Cardinals have long been known to want a veteran relief arm who could fill the role Andrew Kittredge played for the club last year and create a bridge between closer Ryan Helsley and the rest of a relatively young late-inning mix. They now appear to have found that player in Maton, who has just five career saves but has recorded 42 holds over the past three seasons.

Making room for Maton on the 40-man roster is Horn, a fifth-round pick by the White Sox in the 2020 draft. The 27-year-old lefty was traded to the Cubs in exchange for Ryan Tepera at the 2021 trade deadline and was eventually added to his new club’s 40-man roster, but did not make his big league debut in Chicago. He was traded back to the White Sox last February in order to clear a 40-man roster spot for the return of Cody Bellinger, but was then designated for assignment and traded to Boston in April. He made his big league debut for the Red Sox last June but struggled badly with a 6.50 ERA and 7.00 FIP in 18 innings of work.

During the offseason, Horn was designated for assignment by the Red Sox but picked up off waivers by the Tigers in November. Horn lasted on Detroit’s 40-man roster for just a month, however, and was claimed off waivers by St. Louis in early January. He’ll now return to the waiver wire for the fourth time in the last 11 months. The Cardinals will have one week to either trade Horn or put him through waivers, where he can be claimed by any club willing to offer him a spot on their 40-man roster. If he clears waivers, the Cardinals will get the opportunity to outright Horn to the minors as a non-roster depth option. With that being said, Horn’s status as an optionable left-handed relief arm could make him an attractive candidate for a waiver claim despite his lackluster results in the majors last year.