EDIT: Sorry, responded to the wrong reply.
Walker became a good blocker because that's what we needed with our sub par OLine play. Same thing happened to Davis under Martz.
When you're blocking D-Lineman and Linebackers all game, the one or two times you get the ball thrown your way, your hands are all torn up which makes catching the ball difficult.
I remember blocking those guys and getting home after the game. My hands and forearms were all swollen and bruised, even wearing gloves doesn't help much when you get popped in the hand by a facemask with a 300lbs dude behind it, i don't care if you're pro or not.
[ Edited by mkmasn on Apr 14, 2012 at 8:14 PM ]