The Miami Marlins scratched left-hander Jesus Luzardo from Friday's scheduled start because of elbow discomfort.
The team said Luzardo, 26, will undergo further testing.
In his place, right-hander Anthony Maldonado is scheduled to make his major league debut when the Marlins open a four-game series against the visiting Washington Nationals on Friday night.
Maldonado, 26, was called up from Triple-A Jacksonville, where he has gone 11-3 with a 1.84 ERA across 78⅓ innings pitched over three seasons.
Luzardo has struggled through five starts this season, going 0-2 with a 6.58 ERA. He has struck out 27 batters, walked 13 and allowed five home runs in 26 innings of work.
He owns a career record of 23-30 with a 4.32 ERA in 98 games (82 starts) with the Oakland A's (2019-21) and Marlins.
Luzardo is the latest Marlins starting pitcher to be slowed by injury. Left-hander A.J. Puk went on the 15-day injured list Saturday with left shoulder fatigue. Meanwhile, Sandy Alcantara and Eury Perez are both recovering from Tommy John surgery, and Braxton Garrett is out with left shoulder impingement.
Information from Field Level Media was used in this report.