[fullmetal]

I don't think speed is always the issue, though many times, it's the LBs who come in at speed to flatten a slowly-accelerating RB.  I'm worried about the weird angles that knees and ankles can be forced into when many, many pounds of body weight is dropped on them by falling OL and defensive front seven.  See CMac after that kick return today where he ran away from his blockers and into the waiting crumple zone of three WSU tacklers.  He then subsequently left the game for a while.

[fullmetal]

I don't think speed is always the issue, though many times, it's the LBs who come in at speed to flatten a slowly-accelerating RB.  I'm worried about the weird angles that knees and ankles can be forced into when many, many pounds of body weight is dropped on them by falling OL and defensive front seven.  See CMac after that kick return today where he ran away from his blockers and into the waiting crumple zone of three WSU tacklers.  He then subsequently left the game for a while.