By Michael Beller
May 16, 2014
Aroldis Chapman has already racked up five strikeouts and a save since returning from his injury.
Al Behrman/AP

36. Jason Grilli, Pittsburgh Pirates -- Grilli threw a two-inning simulated game on May 14, and will shortly head out on a rehab assignment before joining the Pirates. The team could, however, ease him back into the closer's role, espeically with Mark Melancon pitching so well.

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