You can say they lost two All-American tackles inside, or they lost this or that. The guys USC replaces with are just future All-Americans who haven't had to play yet. They're still fast, still physical, still play with great intensity.
The No. 1 thing you have to do against USC is win the battle of the clock. You've got to keep their offense off the field. That's the best defense there is. Nobody's stopped these guys; I don't know if anybody will. The thing you have to do is limit how many touches they get.