1. You can't hurt The Great Jim Brown. He never missed a game.
2. You CAN hurt Bo Jackson. Florida had a guy named Alonzo Johnson who administered a "deep thigh bruise" that kept Bo out of the remainder of the Florida-Auburn game during Jackson's Heisman year.
3. Bo suffered a career ending injury in what was roughly his 40th pro football game.
4. I quote The Great Jim Brown: "The one thing that stands is that when it was time to play the game, I was there. I played nine seasons and never missed a game. Guys accept the fact now that they can get shaken up, come out, and get themselves together."
5. Chuck Bednarik once admiringly said that even though he constantly hit The Great Jim Brown illegally when the play was over, he could never hurt him. "He would just get up, kind of say "Hi" and he just kept coming." Lesser players, Bednarik noted, would get angry at his illegal hits but The Great Jim Brown didn't mind.
6. For all the talk about speed, strength and so on, durability is THE most important football trait. It's a rough game. The guys who can play a long time are more valuable than the guys who only last a little while.