The Red Sox sent pitching prospect Stolmy Pimentel to the Pirates as part of a six-player deal Wednesday. The Pirates traded reliever Joel Hanrahan and second baseman Brock Holt to Boston, and in return, they received reliever Mark Melancon, outfielder Jerry Sands and infielder Ivan De Jesus in addition to Pimentel. In 22 starts at Double-A Portland last season, Pimentel went 6-7 with a 4.59 ERA.