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St. Louis Cardinals promote Rob Cerfolio to general manager at 34

The St. Louis Cardinals have promoted 34-year-old Rob Cerfolio to general manager. Cerfolio has been St. Louis’ assistant GM for the past three seasons.

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Rotoworld Player News

Tai Peete

STL Outfield

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Tai Peete went 3-for-3 with two walks and four stolen bases for the Javelinas of the Arizona Fall League on Thursday.

The Javelinas went 12-for-13 stealing bases in the 5-3 win over the Rafters, with Carter Graham and Ty Harvey collecting three apiece. Peete is tied for second in the AFL with a .357 average and is third with an 1.103 OPS. He’s 17-for-21 stealing bases in 17 games.
Chaim Bloom

STL General Manager

The Cardinals are promoting Rob Cerfolio to general manager under Chaim Bloom.

The 34-year-old Cerfolio interviewed for the Athletics’ GM position, but it sounded like he preferred staying in St. Louis, as long as it came with a promotion. He gets that here after spending last season as an assistant GM alongside Randy Flores, who is now gone to Houston, and Moisés Rodríguez. A Yale grad, Cerfolio spent nine years with the Guardians before joining the Cardinals two years ago.
Tai Peete

STL Outfield

Cardinals OF prospect Tai Peete was named to the Arizona Fall League All-Star Game.

Peete is the Cardinals’ 17th-ranked prospect, but was a first-round pick by the Mariners in 2023. The 21-year-old is hitting .328/.410/.612 in 16 AFL games and is tied for the second-most stolen bases and second-most triples. He’s making himself part of the Cardinals’ future plans.
Joel McKeithan

STL Hitting Coach

Robert Murray reports that the Cardinals hired Joel McKeithan as their hitting coach.

The 35-year-old McKeithan was the White Sox’s assistant hitting coach for the last two seasons. Before that, he was Cincinnati’s hitting coach from 2023–24 and assistant hitting coach in 2022. He has also worked as a minor league hitting instructor for the Tigers and has previous experience as a coach at Driveline Baseball.
Ramon Mendoza

STL 3rd Baseman

Cardinals re-signed INF Ramon Mendoza to a minor league contract.

Mendoza, 26, was terrific for Double-A Springfield in 2025 (.275/.390/.452) and for Triple-A Memphis (.291/.380/.437) last season, but it hasn’t gotten him any prospect hype or a trip to the majors. He’s decided to stick around with the Cardinals anyway, and there’s the chance he could see some time at third base in St. Louis if things break right next year.
Eduardo Rivera

STL Starting Pitcher #43

Cardinals acquired LHP Eduardo Rivera from the Red Sox for minor league RHP Juan García.

Rivera was designated for assignment on Monday so the Red Sox could get down to their 40-man roster limit. It makes some sense that the Cardinals would want him, since Chaim Bloom used to be the chief baseball officer in Boston and still has connections to personnel there. Rivera is a 23-year-old with a big fastball, but he will now be on his third organization and has yet to establish consistent production. It’s not a bad gamble for the Cardinals to take. Garcia is an 18-year-old right-hander who pitched to a 4.40 ERA, 1.28 WHIP, and 39/10 K/BB ratio in 43 innings in the Dominican Summer League this year.
Tekoah Roby

STL Starting Pitcher #38

Cardinals RHP prospect Tekoah Roby threw 9 2/3 shutout innings in his three starts in the Arizona Fall League.

Roby missed the second half of 2025 and all of 2026 after having Tommy John surgery, so the Cardinals made a plan for him to make three starts in the Arizona Fall League. In those starts, he allowed no runs on six hits (all singles) in 9 2/3 innings while striking out 13 and walking one. “I was very pleased with the results, and also my own evaluations...That’s what this was about, pitching against hitters with a pitch clock rolling and guys on base. I was really happy I got to pitch with some traffic,” Roby said. He’s unlikely to begin 2027 in the Cardinals’ rotation given how much time he missed, but he could be an option soon after if he begins the season well at Triple-A.
Eduardo Rivera

BOS Starting Pitcher #43

Red Sox designated LHP Eduardo Rivera for assignment.

The 23-year-old Rivera pitched four times for the Red Sox last season, giving up seven runs in 10 innings. He’s rather wild and he’s not viewed as having a ton of upside, but he could be at least a nice innings eater in middle relief, and since he has two option years left, some team is going to want him.
Chase Hampton

BAL Starting Pitcher

Orioles claimed RHP Chase Hampton off waivers from the Cardinals.

Hampton is a worthwhile zero-risk pickup for the Orioles since he was one of the top pitching prospects for the division-rival Yankees just a few years ago before injuries derailed his career. The 25-year-old spent time with the Nationals and Cardinals at the end of last year following New York’s decision to finally move on. He’s a literally lottery ticket at this point of his development.
Josh Fleming

STL Relief Pitcher #61

Cardinals re-signed LHP Josh Fleming to a minor league contract.

Fleming began last season with the Blue Jays before signing a minor league deal with the Cubs and then another minor league deal with the Cardinals in August after he was released by the Cubs. The 30-year-old posted a 4.01 ERA, 1.26 WHIP, and 82/24 K/BB ratio in 112 1/3 innings at Triple-A across all three organizations.