Eight days after his dirt-bike accident in Colorado, left-hander Madison Bumgarner began a prolonged rehabilitation on Friday that will extend past midseason.
The Giants’ ace was diagnosed with a Grade 2 sprain in the AC joint of his throwing shoulder and will be shelved until soon after the All-Star break, according to head athletic trainer Dave Groeschner.
Groeschner confirmed Bumgarner won’t need surgery, which wasn’t a surprise. The trainer said Monday that surgery was unlikely, and several doctors — including Giants orthopedist Dr. Ken Akizuki, who consulted with 49ers doctor Tim McAdams — agreed rehabilitation is the proper route.