Freshman season In his final season at Armwood, Striker accepted a scholarship from
Bob Stoops to play for the
Oklahoma Sooners. As a freshman in 2012, he played in all 13 games, but only recorded stats in the game against the
Kansas Jayhawks, making six tackles.
Sophomore season As a sophomore, Striker earned a starting position and started every game. In a loss to rival
Texas, he made a career-high seven tackles with a pass breakup and a tackle for loss. Against
Kansas one week later, Striker got his first career sack, along with six tackles. At
Oklahoma State in the annual
Bedlam Series, he returned a fumble three yards for a touchdown on the final play of the game. In the final game of the year, Striker helped
Oklahoma upset
Alabama in the
2014 Sugar Bowl, recording a career-high three sacks and tying a career-high seven tackles. In the final minute of the game, he also got the first forced fumble of his career when he stripped Bama's quarterback,
A. J. McCarron, followed by defensive end Geneo Grissom picking it up and running it in for a touchdown to seal the Sooners' victory. ==Professional career==