Question marks abound on defense

2013 defensive depth chart: Oklahoma's shaky D could be even worse in 2013

Updated: January 9, 2013, 6:53 PM ET
By Jake Trotter | SoonerNation
NORMAN, Okla. -- Thanks to graduations and early entries into the NFL, the Sooners have several positions to fill on a defense that was already shaky in 2012. SoonerNation breaks that down and projects the rest of the 2013 defensive depth chart:

Quincy Russell
Courtesy of Trinity Valley Community CollegeJuco transfer Quincy Russell will have every opportunity to play right away at defensive tackle.
Defensive tackle: Jordan Phillips, sophomore; Quincy Russell, junior