Oklahoma edged out Army 28-21 in overtime Saturday, but the Sooners would've won in regulation had senior kicker Austin Seibert not missed a 33-yard field goal with three seconds left.
Seibert tweeted an apology after the game.
"I let my teammates, my coaches and sooner nation down tonight," he wrote. "I want to thank all my teammates and coaches for battling through the adversity and getting the win. Everyone goes through adversity at some point in life. It's how you respond to the adversity that shows true character and I will not let this kick define me.