Oklahoma RB Samaje Perine was one of the top running backs in the nation as a freshman in 2014 and broke the NCAA's all-time single game rushing record with 427 rushing yards against Kansas. Perine is expected to have another outstanding season as a sophomore for the Sooners in 2015 and it appears he's been taking advantage of the gym in the offseason.
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That's a RUNNING BACK with that kind of upper body strength. Best of luck to all of the defenders in the Big 12 that have to try their hand at bringing this guy down, because arm tackles are definitely not going to do the trick.
