The 33-year-old Riley is being promoted to replace the retiring Bob Stoops.
"Wow, where did the 18 years go", Stoops said during his news conference Wednesday.
"It isn't my intention to coach again", Stoops said.
In a matter of four hours, Oklahoma's head football coach had retired, held his final press conference, the program hired a new head coach and he held his introductory press conference. Riley's apparent talent did, however, make the timing for Stoops' retirement seem fitting.
The Sooners moved quickly to name a replacement, elevating offensive coordinator Lincoln Riley. "I feel the timing is flawless to hand over the reins", Stoops said. To play a small part in their growth is what I will always cherish the most. Stoops said his health was not a factor in his decision, and reports that he was ill were false. "I feel like I'm honestly living a dream right now". His teams set numerous records at East Carolina, and his success continued as Oklahoma's offensive coordinator. His guidance also helped the Sooners reach the 2000 BCS National Championship.
Riley's first OU offense ranked fourth nationally in scoring (45.3 points per game) and seventh in total offense (530.2 yards per game) in 2015.
Stoops will stay on as a special assistant to the athletic director.
Riley was considered a top coaching prospect nationally.
Riley became one of the highest-paid assistant coaches in the nation when he received a three-year extension worth $1.3 million per year at last month's University of Oklahoma Board of Regents meeting. Another younger brother, Mark, is head coach at Kentucky.
Right person at the right time, Castiglione said.
Riley has massive shoes to fill.
Before the bombshell was dropped that Stoops was no longer the head coach of the Sooners, Stoops had been the longest-tenured active coach in major college football since taking over the program in 1999.
Stoops, 56, is 190-48 in his 18 years at Oklahoma and is the program's career coaching victory leader.
OU legend, national champion and Fort Gibson native, Teddy Lehman weighed in on Bob Stoops' sudden retirement.
The best way to really explain how young Lincoln Riley is would be by giving this example. In 1982, he was named one of the Most Valuable Players in the Big Ten. "All the characteristics necessary to be a great leader and to be a successful head coach. I didn't want to push too far, he yells at me enough sometimes", Mike Stoops said with a chuckle. "They're going to embrace it". The players are ready to win for him.
"I told the guys, coach Riley is the ideal man for the job". So, great coach to the next one..