 On December 26, the Pirates traded established closer Joel Hanrahan and infielder Brock Holt to the Boston Red Sox for reliever Mark Melancon, and prospects Jerry Sands, Ivan Dejesus, and Stolmy Pimentel.With this move, the Pirates resigned setup man Jason Grilli to a two-year deal worth $4.5 million, to become the new Pirates closer.Melancon, who was under-valued after a miserable injury-riddled 2012 season, replaced Grilli as the Pirates setup man.