Tapper, 6-foot-5, 280-pound defensive end from Baltimore, has until Jan. 15 to enter the 2015 NFL Draft if he wants to change his mind.
"Thanks Sooner nation for these great years! I'm sorry this one did not end like we wanted,” Tapper said on his Twitter account. “Some people have been wondering if I will stay or go. But after a hard thought out decision I will be back in Norman, Oklahoma for my senior year to win a national championship!”
This season, Tapper started all 13 games for the Sooners, recording 37 total tackles, with 7.5 tackles for loss and three sacks. He also earned honorable mention All-Big 12 honors from conference's coaches this season.
Oklahoma finished 8-5 after a 40-6 loss to Clemson in the Russell Athletic Bowl on Dec. 29.
Last season, Tapper had 49 total tackles and 5.5 sacks, while helping Oklahoma win the Sugar Bowl.
- Scooby Axson