mcnabb isnt close the qb manning is. mcnabb might win first, but football is a team sport.
and plenty of immobile qb's have won the superbowl. infact its a near friggin tradition, lets see.
dilfer, warner, brady, johnson, brady. maybe u should argue the other way around, that if u can't really and truly pass the ball and u end up relying on things like scrambling, that defense is just too intense in the playoffs to win consistently.