Legendary coach Bob Stoops, 56, will retire after 18 seasons leading the Oklahoma Sooners.
Offensive coordinator Lincoln Riley will take over and lead the team this season. At 33, he is the youngest coach in FBS.
Stoops has compiled a 190-48 record during his career which included one national championship and 10 Big 12 titles. His teams have played for three more national titles. Stoops is the school's all-time winningest coach, passing both Barry Switzer and Bud Wilkins, who each won three national titles during their careers in Norman.
Stoops said the time was right to step down.
"I'm not sad at all," he said. "To everything, there is a season. It's time, and that's OK. I feel more grateful and appreciative and blessed that I had 18 1/2 years doing this with great people, great fan base, an incredible, legendary school, that I got this opportunity. It's been a great ride. I'm happy about it. I'm more happy about that than I am sad that this day is here. It went fast."
Stoops will stay on as a special assistant to the athletic director. Aside from that, he has an open mind about his future.
"I really don't have a plan exactly what I'm going to do," he said. "It's a little bit frightening, but I'm really a spiritual person, and I believe until you open yourself up to something, you don't know what the opportunities are that can come to you. So we'll see what can flow my way."
Stoops' has heart disease but he said his health wasn't a factor in his decision. A friend told KWTV that the loss of his father at an early age because of health reasons was a factor. Ron Stoops Sr. died at the age of 54 after suffering a heart attack on the sidelines at the end of a high school game.
"Bob got to do it in his way," a source told The Oklahoman. "Doesn't get any better than that."
Stoops was hired in 1999 after serving as defensive coordinator at Florida under Steve Spurrier. He previously was an assistant at Kansas State under Bill Snyder.
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