Alberto Arias

After a very rocky start to his season (5.87 ERA through mid-May), Arias came back with a vengeance – carrying a 2.33 ERA at the end of July. He retreated somewhat from those numbers, in part due to injury, but his overall line remained useful for the Houston bullpen. Arias underwent season-ending hamstring surgery in September to remove a bone that had been causing inflammation in his tendon. He walks a few too many batters to be a lock to repeat his 2009 success, but as long as he's healthy, he should leave spring training with a job in the middle of the Astros' bullpen.