I vote Willy. Lord knows the good guys need all the defensive help they can get. Berkman's mobility limitations are mitigated by the small left field, plus he's darn savvy at playing balls of the big wall out there (except for when he's faking a catch with two outs). Willy's certainly been putting good wood on the ball, as well, and it will be nice to have Burke's bat off the bench against Marte or Cotts.