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Trey Gibson SP | BAL
Orioles' Trey Gibson: Heading back to Triple-A
The Orioles optioned Gibson to Triple-A Norfolk on Monday.
The move corresponds with the Orioles selecting Josh Walker's contract from Norfolk and the team transferring Heston Kjerstad (hamstring) to the 60-day injured list. Gibson made his major-league debut May 3 in a spot start against the Yankees and was used in long relief against the Athletics on Friday. Across those two outings, he has allowed four runs on seven hits (including two homers) and three walks while striking out four across 6.2 frames.
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Tristan Beck RP | SF
Giants' Tristan Beck: Recalled from Triple-A
The Giants recalled Beck from Triple-A Sacramento on Monday, Alex Pavlovic of NBC Sports Bay Area reports.
Beck has spent all of this season with Sacramento, collecting a 5.40 ERA and 18:7 K:BB over 16.2 innings of work. The 29-year-old is capable of pitching multiple innings at a time and will likely fill a middle relief role.
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Harrison Bader CF | SF
Giants' Harrison Bader: Reinstated from injured list
The Giants activated Bader (hamstring) from the 10-day injured list Monday, Alex Pavlovic of NBC Sports Bay Area reports.
Bader missed a month of action with a left hamstring strain that first began bothering him late in spring training. He went 4-for-18 with two home runs, one stolen base and a 3:5 BB:K over six rehab games with Triple-A Sacramento. Bader should be in line to serve as the Giants' primary center fielder moving forward.
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Coby Mayo 3B | BAL
Orioles' Coby Mayo: Late addition to lineup
Mayo has been inserted into the Orioles' lineup for Monday's game versus the Yankees in place of Samuel Basallo (knee), Matt Weyrich of The Baltimore Sun reports.
Mayo was slated to ride the bench for the second day in a row, but he's been granted a reprieve. The 24-year-old is just 4-for-35 with a 0:14 BB:K over his previous 13 contests.
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Samuel Basallo C | BAL
Orioles' Samuel Basallo: Scratched with knee injury
Basallo was scratched from Monday's lineup against the Yankees due to left knee discomfort, Andy Kostka of TheBanner.com reports.
Basallo picked up the injury from a collision at home plate during the seventh inning of Sunday's game against the Athletics, per Jake Rill of MLB.com. The Orioles should have an update on the 21-year-old's status once he undergoes more tests on his left knee. Coby Mayo will serve as Baltimore's designated hitter and bat sixth in Monday's series opener.
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Jeremy Pena SS | HOU
Astros' Jeremy Pena: Slated for rehab games
Pena (hamstring) will begin a rehab assignment Tuesday, likely at Double-A Corpus Christi, Brian McTaggart of MLB.com reports.
Pena will go through a full workout Monday first, and as long as he gets through that without any hiccups, he'll play in his first game in more than a month Tuesday. The shortstop could be back on the Astros' active roster before the end of this week.
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Josh H. Smith LF | TOR
Rangers' Josh Smith: Now dealing with wrist issue
Smith (lower body) is dealing with a wrist injury that will delay his rehab program, Jeff Wilson of AllDLLS.com reports.
Smith landed on the 10-day injured list this past Tuesday due to a right glute strain. A minimum stint on the IL would have Smith eligible to return May 15, but his new wrist issue will likely push that return date by at least a few days. Prior to his placement on the IL, Smith was slashing .217/.324/.239 with two steals and six RBI across 108 plate appearances.
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Carlos Santana 1B | ATL
Diamondbacks' Carlos Santana: Setback on rehab assignment
Santana suffered a setback with his right adductor strain Sunday while on a rehab assignment with Triple-A Reno, Nick Piecoro of The Arizona Republic reports.
Santana had appeared poised for activation from the 10-day injured list ahead of Monday's game against the Rangers, but his status is now up in the air. The 40-year-old was functioning as the Diamondbacks' primary first baseman before getting hurt in early April, but with the emergence of Ildemaro Vargas, Santana could be looking at a reduced role when he does make it back.
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Jakob Junis RP | TEX
Rangers' Jakob Junis: Working as opener Monday
Junis will serve as the Rangers' opening pitcher for Monday's game against the Diamondbacks, Jeff Wilson of AllDLLS.com reports.
Junis will be called upon to start on short notice after Nathan Eovaldi (side) was a late scratch for his scheduled turn through the rotation. Though he's made 116 career starts in the big leagues, Junis has worked exclusively as a reliever since the start of the 2025 season and may not be asked to cover more than 1-to-3 innings Monday. Cal Quantrill will be available out of the bullpen on two days' rest and could be an option to cover multiple innings once Junis exits the game.