"Zach Britton threw off a mound today, first time, full mound," manager Buck Showalter said. "That's good. He is doing everything on the rehab calendar, falling right on schedule."
Showalter wasn't ready to announce the next steps with the prized lefty, and actually hadn't spoken with Britton after he threw an undetermined number of pitches on Friday.
"Don't ask me exactly what he is doing next, exactly when he is going to pitch in a game, but so far, so good," Showalter said.
Britton, 24, had two rounds of injection therapy in March, and it was deemed a six-week process at the time.