This week we've begun breaking down the big position battles that every Big 12 team will face this spring.
Below is a closer look at the running back battle at Oklahoma:
Spring contenders: Sophomore Rodney Anderson, sophomore Abdul Adams, junior Marcelias Sutton, true freshman Trey Sermon.
The skinny: Last season, the Sooners featured one of the most dynamic running back combinations in the country in Perine and Mixon.