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Lyon Richardson RP | MIL
Reds' Lyon Richardson: DFA'd by Reds
The Reds designated Richardson for assignment Tuesday.
Richardson served as the opener Monday versus Kansas City and took the loss after surrendering four runs over one inning, and he's now been removed from both the 26-man and 40-man rosters. Brandon Leibrandt was also DFA'd, opening up roster space for the promotions of Zach McCambley and Luis Mey.
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German Marquez SP | SD
Padres' German Marquez: Making rehab start Tuesday
Marquez (forearm) will begin a rehab assignment with Triple-A El Paso on Tuesday.
Marquez has been shelved for the past month after going down with right forearm nerve irritation, but the veteran right-hander resumed throwing in mid-May and has been cleared to pitch in a rehab setting after facing hitters last week. It's not clear how many rehab starts the Padres will ask Marquez to make. He held a 5.76 ERA, 1.45 WHIP and 19:12 K:BB across 29.2 innings before getting hurt.
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Brandon Leibrandt RP | CIN
Reds' Brandon Leibrandt: DFA'd by Cincy
The Reds designated Leibrandt for assignment Tuesday.
The left-hander had his contract selected from Triple-A Louisville on Monday and was immediately called upon to cover six innings out of the bullpen. Leibrandt gave up five runs on 10 hits and three walks with six strikeouts. It was the 33-year-old's first big-league appearance since 2024.
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Lourdes Gurriel LF | ARI
Diamondbacks' Lourdes Gurriel: Not ready to return from IL
Gurriel (hamstring) appears on track to begin a rehab assignment in the rookie-level Arizona Complex League as soon as next Monday, MLB.com reports.
Though Gurriel is eligible to return from the 10-day injured list Tuesday, he'll need some more time to fully heal from the left hamstring injury that he sustained on a sliding catch during a May 22 game against the Rockies. According to the report, Gurriel has resumed running, taking part in outfield drills and taking batting practice against a machine since landing on the IL. He'll likely increase the intensity of his workouts this week before heading out on a rehab assignment and potentially making his return to the Arizona lineup around the middle of June.
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Luis Mey RP | CIN
Reds' Luis Mey: Back in majors
The Reds recalled Mey from Triple-A Louisville on Tuesday.
The right-hander spent the past couple weeks at Louisville but is back with the Reds on Tuesday for his second big-league stint of the season. Mey made six appearances for Cincinnati earlier this year and gave up five earned runs with a 14:7 K:BB across 8.1 innings.
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Zach McCambley RP | CIN
Reds' Zach McCambley: Contract selected
The Reds selected McCambley's contract from Triple-A Louisville on Tuesday.
The 27-year-old was acquired from the Marlins in exchange for Rece Hinds on May 21 and is now on the cusp of making his MLB debut. Across 30.1 innings at the Triple-A level this year, McCambley has a 2.37 ERA, 1.19 WHIP and 37:18 K:BB in 15 appearances (two starts).
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Demetrio Crisantes SS | ARI
Diamondbacks' Demetrio Crisantes: Rejoining Amarillo lineup
Double-A Amarillo reinstated Crisantes (hamstring) from its 7-day injured list Tuesday.
Crisantes is set to make his 2026 debut for Amarillo after a hamstring injury kept him out for most of the first two months of the minor-league season. The 21-year-old infielder was cleared to return to action for the Double-A club after he went 5-for-20 with two home runs, a double and six walks across seven rehab games between the Diamondbacks' rookie-level Arizona Complex League affiliate and High-A Hillsboro.
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Ryan Gusto SP | MIA
Marlins' Ryan Gusto: Called up to pitch Tuesday
The Marlins recalled Gusto from Triple-A Jacksonville to pitch Tuesday against the Nationals.
Lake Bachar is opening Tuesday's contest for Miami with Gusto poised to follow as the bulk reliever. The 27-year-old made his season debut for the Marlins in early April with a scoreless inning out of the bullpen, but he's primarily worked out of the rotation at Jacksonville and posted a 3.83 ERA, 1.31 WHIP and 52:17 K:BB across 44.2 innings.