LAWRENCE, Kan. -- Heisman Trophy front-runner and Oklahoma quarterback Baker Mayfield apologized for his "unacceptable" and "disrespectful" actions toward Kansas players during the Sooners' 41-3 victory Saturday.

During a chippy game that was preceded by a Kansas captain refusing to return Mayfield's offer of a handshake during the coin toss, Mayfield grabbed his crotch and appeared to yell "F--- you!" at the Jayhawks' sideline.

"I got caught up in a competitive game, a chippy game, but what I did was unacceptable," Mayfield said. "I apologize. It's disrespectful. It's not the example I want to set. It's not the legacy I want to leave at OU. I truly do apologize. Thinking about the kids that are watching this now, it's not something I want to do to the parents out there. I'm sorry."

Mayfield also issued an apology later Saturday on his Twitter account.

Oklahoma coach Lincoln Riley said there was "no excuse" for Mayfield's actions and said he would consider disciplinary action once he gets the chance to watch the antics for himself.

"It was a chippy game, and it was chippy from the second their guys decided they didn't want to shake our hands at the coin toss," Riley said. "The chippiness started there. ... Baker is a competitive guy and let his emotions get the best of him. We can't have that, he can't do that."