Nation's top 15 defensive lines
Notre Dame leads list of college football's best defensive fronts
Updated: June 17, 2013, 4:37 PM ETBy Phil Steele | ESPN Insider
Jonathan Daniel/Getty ImagesDefensive end Stephon Tuitt, a first team All-American last year, is back in South Bend.
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The Sooners remain No. 1 in the Playoff Forecast, but Auburn and Notre Dame are on the rise.