Originally posted by Dubs48
umm big guys r faster and more athletic than u think man, 
Saw a local cop the other day... seemed like a nice young fella... probably weighed around 280... with about 80 pounds of that held in by a belt around his waist. I seriously wanted to sneak up behind him and give him a wedgie, then jog away and watch him give chase... for as long as he could. And I'm at LEAST twice his age!

On a more serious note, lots of NFL big men are QUICK... deadly for short sprints, But to watch one try to run 100 yards is hilarious. About 40 yards into the run they look like a beached whale desperately seeking water (and air). I'll give you that, perhaps, speed ISN'T the issue... but if you want your 300 pound lineman to play ST's, then a bigger appropriation of his energy should be swallowed up than it seems to be. Seriously... count the 30 yards they run down the field to meet their opponent, then the 30-50 yards they run after such a meeting to chase down said opponent, I guarantee you 90% of those "biggies" would be out of gas long before the play was over... and long after as well.
-1 to the OP but something needs balanced better.