Former Boston Red Sox prospect Michael Kopech is on the comeback trail … again.

Los Angeles Dodgers manager David Roberts said Wednesday that Kopech is beginning a minor-league rehab assignment, according to The Athletic’s Fabian Ardaya .

The right-hander took the mound Thursday for Triple-A Oklahoma City, and it didn’t go well. Entering the game in the fourth inning, he gave up three runs on two hits and two walks in 2/3 of an inning pitched.

Kopech ended up taking the loss for the Comets. He threw 24 pitches, but just 10 for strikes as the Albuquerque Isotopes beat Oklahoma City, 8-5.

The 29-year-old started the 2025 season on the injured list with a shoulder injury and returned from the 60-day IL in June. He looked sharp, making eight scoreless relief appearances . That i

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