Zack Greinke threw a full bullpen session today exactly three weeks after surgery to repair a broken collarbone.— Ken Gurnick (@kengurnick) May 4, 2013
Greinke, 29, had his collarbone broken during a benches-clearing brawl with Carlos Quentin and the Padres on April 11. He needed surgery, and the original timetable had him missing eight weeks, though it seems he might be ahead of schedule if he's already throwing full bullpens.
In addition to Greinke, the Dodgers have also lost starters Chad Billingsley (Tommy John surgery), Chris Capuano (calf), Stephen Fife (shoulder) and Ted Lilly (rib cage) to the DL this year. Aaron Harang was traded away before the injuries struck.