Oklahoma position grades: Defensive back 

January, 31, 2012
1/31/12
4:15
PM ET
Before the Sooners' 31-14 win over Iowa in the Insight Bowl, Jake Trotter and Brandon Chatmon analyzed each Oklahoma position group. Now, the SoonerNation staff is giving each position a grade for its performance in 2011.

Grade: C+
Ninety-five percent of the time, the “Sharks” played an “A” game. But the five percent they didn’t proved to be calamitous. Replacing cornerback Jamell Fleming will be a challenge. He was OU’s best defensive back all season, despite missing two games due to minor knee surgery.
- Jake Trotter
Impact Performance Winner
Oklahoma running back Samaje Perine is the winner of the Capital One Cup Impact Performance of the Week after rushing for an FBS-record 427 yards.
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