The only thing that is different is that Butler got sick. Because of his illness, he probably didn't practice well. This is the most likely the case, since it would be consistent with what BB told us (football related) and what Butler stated (not parties, drugs, etc). Belichick has every right to sit him if he doesn't understand the game plan (he has told his guys before if you don't know what's going on I can' t play you), but for pete's sake, put him in for a few defensive snaps if your D is getting torched in the Super Bowl. What do you have to lose?