I am going to go out on a limb here and say if he was not having to punch through and drag 330/lb Defensive linemen down the field he may be a little more durable.

So now we have a third reason to get after our O-Line.
1. Protect Brees... Damitt! If his helmet touches the turf once I am kickin all their asses. Or going down swinging.. LOL
2. Ivory and PT will last a hell of a log longer.
3. Bush can run N/S instead of pop-locking his way across the line of scrimmage.