 Boesch began his minor league career in 2006 with the short season Oneonta Tigers, where he was a NY-Penn League All-Star.With the Single-A West Michigan Whitecaps, in 2007, Boesch led all of Single A in RBIs and was third in hits.With the Double-A Erie SeaWolves, Boesch led the Eastern League in home runs (28) and won the MILB Round Trippers Award for leading all of AA in home runs, en route to his selection by Baseball America as Best Power Prospect AA.