Retired Baltimore Ravens linebacker Ray Lewis saw a lot of football over the course of his 17-year career.
Still, Lewis thinks New England Patriots tight end Rob Gronkowski took things to another level Sunday when he drilled defenseless Buffalo Bills cornerback Tre'Davious White in the back of the head.
Related: NFL upholds Gronkowski's 1-game suspension after appeal
Lewis, long known as one of the NFL's toughest and hardest-hitting defenders, was never suspended during his career.