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Mason Adams SP | COL
White Sox's Mason Adams: Returns after Tommy John surgery
Adams (elbow) has posted a 5.74 ERA, 1.34 WHIP and 18:5 K:BB in 15.2 innings over four starts with Triple-A Charlotte since being assigned to the affiliate after being activated from Double-A Birmingham's 60-day injured list June 11.
Adams made a fairly swift recovery from Tommy John surgery, which he underwent April 2, 2025. He kicked off a rehab assignment just over 13 months after surgery, making five appearances between the rookie-level Arizona Complex League and High-A Winston-Salem before joining the Charlotte rotation. The 26-year-old righty is regarded as one of the White Sox's better upper-level starting pitching prospects, but he's not on the 40-man roster and is likely behind a few other arms in the pecking order for a call-up to the big club.
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Wikelman Gonzalez SP | MIA
White Sox's Wikelman Gonzalez: Back in action for Triple-A club
Gonzalez (lat) tossed a scoreless inning of relief Tuesday for Triple-A Charlotte after being reinstated from the 7-day injured list.
Gonzalez made his return to the Charlotte bullpen for the first time since late April after being shelved due to a right lat strain. The 24-year-old righty compiled a 6.75 ERA, 0.94 WHIP and 8:1 K:BB in 5.1 innings over four rehab appearances between the White Sox's rookie-level Arizona Complex League affiliate and High-A Winston-Salem prior to returning from the IL.
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Shane Smith SP | CHW
White Sox's Shane Smith: Begins rehab at High-A
Smith (shoulder) struck out two and allowed one hit and no walks over two innings Wednesday in a rehab start with High-A Winston-Salem.
An All-Star selection for the White Sox as a rookie Rule 5 Draft pick in 2025, Smith surrendered 10 earned runs over 8.2 innings over his first three starts this season before Chicago optioned him to Triple-A Charlotte on April 8. After making four starts for Charlotte, Smith was shelved May 2 due to a right rotator cuff strain, but he's closing in on a return to the Triple-A rotation nearly two months later. Smith could make another rehab start or two in the lower levels of the minors before Charlotte activates him.
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Keyner Benitez SP | MIA
Marlins' Keyner Benitez: Done for season with arm injury
Single-A Jupiter placed Benitez on the injured list May 9, and the left-hander is expected to miss the rest of the season due to an arm injury, J.J. Cooper of Baseball America reports.
Benitez had gotten off to a stellar start this season for Jupiter, generating a 2.79 ERA, 0.83 WHIP and 24:9 K:BB in 19.1 innings through five starts. During his final appearance May 7, Benitez was working on a no-hitter midway through the fourth inning before he was abruptly pulled from the start after getting checked out on the mound by a trainer, per FishOnFirst.com. Benitez didn't look to be in any major discomfort at the time he was removed from the game, but the Marlins determined days later that he would need to be shut down. Details regarding Benitez's injury remain scarce nearly two months later, but the fact that he's been shut down for the season could point to the 20-year-old lefty requiring elbow or shoulder surgery.
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Cooper Hjerpe RP | STL
Cardinals' Cooper Hjerpe: Returns from 60-day IL
Double-A Springfield activated Hjerpe (elbow) from the 60-day injured list Thursday.
Hjerpe had Tommy John surgery last April and has completed a rehab assignment, allowing four runs with a 9:3 K:BB over 8.2 innings covering five starts between Single-A Palm Beach and the rookie-level Florida Complex League. The left-hander struck out four over three scoreless frames in the FCL his last time out and will continue to get stretched out in the Springfield rotation. Hjerpe is on the Cardinals' 40-man roster and should move up to Triple-A Memphis before long if he's pitching well. A major-league debut during the second half is possible.
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Ricky Tiedemann RP | TOR
Blue Jays' Ricky Tiedemann: Given injections for neck
Tiedemann (elbow) will be given injections for his injured neck, Ben Nicholson-Smith of Sportsnet.ca reports.
Nagging neck problems have prevented Tiedemann from making any rehab starts over the past two weeks. He had previously made a pair of one-inning rehab appearances with the Blue Jays' rookie-level Florida Complex League affiliate. Tiedemann initially landed on the 7-day injured list at Triple-A Buffalo as he continues to work his way back from left elbow surgery. It's unclear when he might be ready to pitch again.
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Lance McCullers SP | MIL
Astros' Lance McCullers: Another strong rehab start
McCullers (shoulder) struck out three and allowed one earned run on four hits and one walk across four innings Wednesday in a rehab start with Triple-A Sugar Land.
McCullers has been stellar through his first two rehab outings at Sugar Land, allowing just one earned run while posting a 7:1 K:BB over seven innings. The right-hander tossed 60 pitches in Wednesday's appearance, so he'll likely need to make at least one more start in the minors before Houston brings him back from the 15-day injured list. McCullers had posted a lowly 6.86 ERA and 1.53 WHIP in eight starts for Houston before being shelved May 19 due to a rotator cuff impingement, and despite the strong form he's showed in the minors, he could face an uphill battle to reclaim a spot in a crowded big-league rotation once activated. Though the Astros have already decided that Cristian Javier (shoulder) will go to the bullpen when he returns from the 60-day IL on Friday, Ronel Blanco (elbow) has also built up to the 60-pitch mark during his rehab assignment and could be prioritized ahead of McCullers for a starting role upon his activation from the IL.
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German Marquez SP | SD
Padres' German Marquez: Pitches in relief again at Triple-A
Marquez (forearm) recorded two outs and allowed three earned runs on three hits and one walk during his rehab appearance Tuesday with Triple-A El Paso.
Marquez kicked off his rehab assignment June 2 and started in each of his first four appearances for El Paso, maxing out at five innings and 73 pitches. While his usage seemed to indicate that the Padres were considering Marquez for a spot in the rotation upon his return from the 15-day injured list, the veteran righty now appears to be preparing for a bullpen role. He's worked in relief in his last two outings for El Paso, striking out three while allowing four runs on six hits and three walks in 2.1 innings between those contests. Marquez's 30-day rehab window officially came to a close Wednesday, so the Padres could look to activate him at some point during their upcoming four-game series with the Dodgers.
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Connor Prielipp SP | MIN
Twins' Connor Prielipp: Won't make start this week
Prielipp isn't listed among the Twins' probable starting pitchers for their three-game weekend series versus the Yankees in New York.
The Twins will end up going with a four-man rotation during their six-game week, with Prielipp having his turn skipped after he struck out a career-high 10 batters over six innings in his last outing Sunday against the Rockies. Prielipp has covered six innings and tossed 90-plus pitches in four of his last five starts, so the Twins may simply be looking to manage the workload of the 25-year-old lefty, who previously underwent Tommy John surgery in 2021 and a UCL repair with an internal brace in July 2023. If he isn't used out of the bullpen over the weekend, Prielipp will likely re-enter the rotation at some point during the Twins' home series with the Guardians that runs Tuesday through Thursday.
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Nate Payne SP | MIA
Marlins' Nate Payne: Having breakout campaign
Payne has posted a 3.93 ERA, 1.21 WHIP and 95:22 K:BB over 68.2 innings this season between Single-A Jupiter and High-A Beloit.
An 18th-round pick in the 2024 First-Year Player Draft out of a Pennsylvania high school, Payne gave up an offer from George Mason to start his pro career early, per Christina De Nicola of MLB.com, and the decision seems to be paying off. While the 20-year-old southpaw sits in the low 90s with his fastball, his velocity has crept up since he was drafted and the pitch comes with significant ride that allows him to work up in the zone. He then turns to a potentially plus curveball and slider for his whiffs. Payne likely still profiles as a back-of-the-rotation option in the majors at best unless he can add more juice to his fastball and improve his changeup, but his development so far has been impressive.