Jason Grilli left tonight's game with right forearm discomfort. He will be re-evaluated tomorrow, at which point we will hopefully learn more about his situation and whether he will miss any time. Forearm discomfort and a pitcher walking off the mound and leaving the game after throwing a pitch usually don't result in just a few days off. It's very possible the Pirates will need a replacement on the roster for Grilli in the short-term.

Mark Melancon has been one of the best relievers in baseball this year. (Photo by: David Hague)
Closer Depth
Mark Melancon, RHP - No doubt, if Grilli goes down, Melancon is the next in line to close. He has the second best ERA among qualified relievers, next to Jesse Crain. He also has the sixth best xFIP this year out of 151 qualified relievers, so it'...

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