Aroldis Chapman is undergoing surgery to repair a broken bone above his left eye, but has no other serious injuries.
The Cincinnati Reds closer could begin throwing off a mound in six to eight weeks, a timetable that could get him back in games in late May.
Doctors called Chapman "a very lucky guy."
A metal plate will be inserted in the bone above his left eyebrow, with perhaps a bone graft as well, and will remain there permanently. Chapman has a very mild concussion after being struck by a line drive on Wednesday night.