Musgrove will throw a minor-league start Saturday, Elizabeth Bloom of the Pittsburgh Post-Gazette reports.
Musgrove battled a shoulder injury throughout camp, though he made the Pirates' Opening Day roster. He'll throw against minor leaguers Sunday before making his first major-league start sometime during the Pirates' series against the Reds, which begins April 5. That would mean Musgrove would miss his first turn in the rotation, but barring any setbacks shouldn't miss any more than that.