Complex sentence: His 1988 shot on Rams quarterback Jim Everett led to a rule prohibiting defensive players from hitting quarterbacks below the waist while they are still in the pocket; for a while, it was unofficially termed the "Andre Waters Rule".
Split into simpler sentences: His 1988 shot on Rams quarterback Jim Everett led to a rule prohibiting defensive players from hitting quarterbacks below the waist while they are still in the pocket. For a while, it was unofficially termed the "Andre Waters Rule".