LOS ANGELES -- The yellow jersey Cody Kessler wears during USC practices provides him some security -- he can't be touched.
The defacto sacks against the Trojans quarterback are nothing more than slaps on the back.
He knows that'll be different if he were playing in a real game, but for now, he's very grateful for the yellow jersey.
"I'm kind of glad we're not getting hit out here, because if we got hit every time that we got tapped by our defensive line, I don't think we'd last very long," Kessler said.
The rest of his teammates have a different story. Everyone is fair game in what is likely the most physical training camp USC has seen in the Lane Kiffin era.
By allowing his team to be so physical, he's walking a tightrope.
Kiffin knows his team has to be physical. The lack of physicality during practice last season became a detriment during the Trojans' 7-6 campaign of 2012.
However, being physical can cause injuries, which affects one of USC's weakest attributes -- depth....