One of the problems I have with Bibby, is that he won't even admit he has a problem on defense. Larry Bird wasn't the quickest guy on the court and could'nt jump out of the building but he was a pretty good defender. My point is that there are some guys that are gifted atheleticly who are not very good defenders and there are some guys who, like Bird don't have those gifts who are good defenders.
Good defenders study their man. They know his tendicies. If he likes to go right, you make him go left. You know where he likes to shoot from and you don't let him get to that spot. Bird said once that you have to make your man uncomfortable. Make him do things he doesn't want to do. You also know where your help is. If its in the middle, you don't let him go baseline. Its all about being smart and desire. Bibby isn't dumb, so I have to assume that he simply doesn't have the desire. Maybe Theus can install some..