VIDEO: Baker Mayfield's block leads to long Oklahoma touchdown run

Oklahoma quarterback Baker Mayfield put his feistiness on full display Saturday night during the second quarter of the Sooners game against Oklahoma State.

Mayfield's block on a Cowboys defensive back down the field helped spring running back Joe Mixon 66 yards for a touchdown, moments after Samaje Perine busted off a 68-yard touchdown bolt.

The Mixon touchdown gave Oklahoma a 21-10 lead early in the second frame in Stillwater.