Funny thing is from what I've heard he doesn't necessarily blow anyone away with his bench press, verticle or 40 yard dash.
The guy just knows football and plays at a frenzy for one hour!!
he's intelligent
so he just has to be in game shape
his study habits put him in the correct positions to make the correct plays year in and year out.
especially playing linebacker
he reads the formation
anticipates the spot he needs to be in depending on his assignment
and then executes.
you need the speed when you fuck up and need to recover.
if you don't fuck up to begin with then?