Worst underperformer, hitter: Adrian Gonzalez
The notion that he can't play in Boston is a foolish one—he led the league in hits last year (213) while hitting .338 with 27 homers and 117 RBIs. But that's tough to remember now given Gonzalez's bizarre power outage. The 30-year-old first baseman has just six homers this season, his OPS (.745) is more than 200 points lower than his final number last year, and he has just a .416 slugging percentage. He is leading the league in doubles (27), but that's almost a laughably small consolation from a player who has just two more homers than backup catcher Kelly Shoppach.