The performance of the bullpen has played a role in the the Pirates' winning ways, especially given the many close games they have won. Pittsburgh's relievers are ranked 2nd in the National League in ERA, 3rd in strikeout percentage and 4th in FIP.

Justin Wilson may see more late-inning relief outings in place of Mark Melacon. (Photo credit: David Hague)

That success has not come without a cost, though, or at least a mortgage. Mark Melancon (0.96 ERA, 1.74 FIP) has pitched the 10th-most innings in the NL, while Justin Wilson (1.45 ERA, 3.10 FIP) has pitched the 4th-most. Tony Watson is on pace to throw the most innings of his career by far, Jason Grilli could pitch many more than last year, and Vin Mazzaro has been used in many games during his first season as a full-time reliever.
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