Photo: Adrian Peterson shows support for Oklahoma

The Oklahoma Sooners finished the regular season 11-1, and clinched the Big 12 championship. The success all but locks them into a spot in the College Football Playoff, which has a number of fans and alumni pretty happy.

One such member is Minnesota Vikings running back Adrian Peterson.

Peterson showed support for his alma mater in the Vikings locker room, and you can check out the photo for yourself below.

#OUDNA pic.twitter.com/FKQQC2YQZ0

— Adrian Peterson (@AdrianPeterson) December 5, 2015

Peterson knows what it’s like to play for a national championship after going to the big game in 2004 with the Sooners.

However, his team ultimately lost to LSU. Are the Sooners of 2015 a better team than the teams of 2003 and 2007? We’ll find out soon enough.

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