I got a kick out of this one.
AD and anybody could include those like Kobie Turner who learn by positive example, and offensive linemen who get roughed up of knocked on their arse and learn by negative example.
I remember an interview years ago with a Chicago Bear running back, I don't remember which one, was asked who was the hardest-hitting defensive player he played against. He answered without hesitation: "Dick Butkus." He went on to say that after practicing daily against Butkus the rest of the league was easy. He wasn't afraid of them.
