Heisman trophy runner-up Toby Gerhart gives any defense fits. He's run for 1,736 yards and 26 touchdowns, both tops in the nation as he is the lead dog on this Stanford sled.
Stanford head coach Harbaugh knows this will be a real test for the Cardinal.
"They're really well coached, and they have really good talent, and if they spot a weakness, they go after it. So we're spending our days making sure every brick is in place, and kind of fortifying the wall, so to speak," says Harbaugh.