CL: Matt Thornton
White Sox (all stats through June 1)
Thornton was victimized by some terrible defense in April, which contributed to him losing the closer role first to Chris Sale, then to Sergio Santos, who holds it today. Thornton didn't help himself by rediscovering the control problems that plagued him in the early days of his career, walking a bit more than 10 percent of the men he faced for the first time since 2005. He was much more effective in May, and would be first in line to move back into the ninth-inning job should Santos falter.