Zimmer (shoulder) completed a four-week throwing program and will be ready for the start of spring training, MLB.com's Jeffrey Flanagan reports.

The throwing program was standard protocol for pitchers recovering from Thoracic Outlet Syndrome surgery, which Zimmer underwent in mid July. While he is expected to be ready for spring training, this is a serious shoulder procedure that has been a limiting factor in the careers of other pitchers. Zimmer has frontline stuff when healthy, but he needs to be heavily discounted due to the mounting health concerns with his shoulder.