By Mark Polishuk | July 31, 2025 at 9:58pm CDT

The Athletics are calling up pitching prospect Luis Morales prior to tomorrow’s game with the Diamondbacks, according to reporter Francys Romero.  Morales will be making his Major League debut whenever he makes his first appearance in a game.  No corresponding moves will need to be made, as the Athletics’ deadline trades have left space on both the 26-man and 40-man rosters.

Mason Miller was one of the players dealt, as the A’s sent Miller and JP Sears to the Padres as part of a blockbuster six-player swap.  The 22-year-old Morales may slide right into Miller’s old bullpen role, if perhaps not specifically as a closer, given how Morales has been operating as a multi-inning reliever over his last month of Triple-A action.  While Morales had operated almost exclusively as a starter before the role change, the decision was made to help manage Morales’ innings.  He has already set a high career high with 89 1/3 frames in 2025, and the A’s are interested in seeing how Morales can now far against big league hitters.

MLB Pipeline ranks Morales as the 80th-best prospect in baseball, and he also sat 79th in Baseball America’s preseason top-100 ranking.  The A’s gave the Cuban-born Morales a hefty $3MM bonus as an international prospect in 2023, and he has been living up to expectations by making a pretty quick rise through the farm system.  The 2025 season has seen Morales pitch at the Double-A and Triple-A levels for the first time, and he has a 3.73 ERA, 9.6% walk rate, and 29.2% strikeout rate over his 89 1/3 combined innings at the two affiliates in Midland and Las Vegas.

Morales’ control has been average at best, but he brings heavy velocity with a fastball that sits in the 96-97mph range, and cracking the 100mph threshold seems a possibility with this temporary move to the bullpen.  His slider is another quality pitch and his changeup has promise, but is a little more inconsistent.

Pipeline’s scouting report notes that Morales cut back to just these three pitches, and while he could reincorporate his curveball or another pitch down the road, narrowing an arsenal is usually a sign that an organization could be ultimately viewing a pitcher as a reliever over the long term.  The A’s will surely give Morales a chance to stick as a starter before considering a permanent move to the pen, of course, and he might well get a couple of starts in the majors in an early audition for 2026.