Two years ago today, head coach Lincoln Riley announced he was departing to take the same job at USC.

It was less than 24 hours after the Sooners lost an emotional game to rival Oklahoma State.

“Leaving OU was probably the most difficult decision of my life. OU is one of the best college football programs in the country, and it has been forever. That’s not going to change. It’s not going to change in the SEC, it’s not going to change with another head coach,” Riley said in a statement released by Oklahoma.

“It’s stood the test of time and it’s going to continue to do so. This was a personal decision solely based on my willingness to go take on a new challenge, and I felt like it was the right opportunity for me and my family to do that.”

Former OU coach Bob Stoops would be the Sooners’ interim head coach for the upcoming Alamo Bowl (where OU would defeat Oregon 47-32).

Riley served five seasons as OU’s head coach. He was Stoops’ offensive coordinator in the 2015 and 2016 seasons before being elevated to head coach in 2017.

Take a look back at his OU coaching career below: