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Orioles Place Ryan Mountcastle on 10-Day IL, Promote Coby Mayo

Jordyn Adams joins the active roster with several injured players on rehab assignments poised to return soon.

Baltimore Orioles third baseman Coby Mayo throws to first base before a baseball game against the Kansas City Royals, Sunday, May 4, 2025, in Baltimore. (AP Photo/Daniel Kucin Jr.)
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Overview

  • First baseman Ryan Mountcastle suffered a right hamstring strain while stealing home on Friday and was moved to the 10-day injured list on Saturday.
  • The Orioles summoned No. 2 prospect Coby Mayo from Triple-A Norfolk to provide corner infield depth; he has five hits in 53 major league at-bats this season.
  • Baltimore also selected outfielder Jordyn Adams’s contract and designated catcher Chadwick Tromp for assignment to clear roster space.
  • The club currently has 12 players on the injured list but expects reinforcements as Colton Cowser and Jordan Westburg work through rehab assignments.
  • Additional injured players including Tyler O’Neill, Gary Sánchez and Ramón Laureno took batting practice Saturday, signaling potential returns.