Dr. Negative Dinger
Considering the alternatives at the time of Storen, Floyd, Biagini, Tepera, Chavez, Schultz, Cecil, Loup, he's been one of our most reliable relievers and a valuable part of the pen that cost us next to nothing. When a player costs little and at worst will be equal to what we have with potential to be greater, that's what's considered a low risk high reward move.
Grilli was a damn good pick up for such a volatile bullpen.