Fister was expected to play catch during batting practice on Tuesday. Assuming that went off without a hitch, he would start a throwing progression that would include long-tossing from increasing distances before a full-fledged mound session.
"He came in [on Monday], got treated, did some really tough exercising and passed that with flying colors," manager Jim Leyland said. "I really don't have any timetable."
Because Fister has missed so much time since sustaining the injury two and a half weeks ago, he's expected to need a full progression of workouts before coming back. That pretty much rules out a return before the calendar changes from April to May.