Michael Fulmer will take a break from live pitching to work on his mechanics.
Specifically, the Detroit Tigers want him to work on lower-body mechanics.
"He took a step back to refine his lower-body mechanics," Ron Gardenhire said. "We have no timetable when he's going to get back on the mound."
Fulmer had a 4.69 ERA last year and his season was cut short by knee problems.