J.D. Drew (BOS) has been struggling. He's currently hitting .228/.342/.338 with 3 HRs; at this point last year he was hitting .269/.346/.434 with 6 HRs. Obviously the lack of power is the main issue.
As the graphic shows, Drew is really struggling to do anything with pitches away, and his power zone up has faded.
Drew's HR/FB rate currently sits at 5.1%, more than 10% below his 2010 number. He's walking at about the same rate, however, if he doesn't begin to prop up his power numbers, he may find himself on the bench as the Red Sox look to younger players like Pawtucket callup Josh Reddick.