The 6-foot-8, 240-pound junior forward decided to leave the Cougars shortly after a coaching change that brought in Kelvin Sampson. He chose the Sooners over Miami.
Thomas averaged 15.4 points and 8.1 rebounds and will likely sit this coming season and have one year of eligibility remaining, but he told ESPN that he will attempt to receive a waiver from the NCAA and try and be ready to play this coming season.
"It was the best fit for me because I only have one year," Thomas told ESPN on Sunday. "I feel like I can make a big impact on the team."
Oklahoma returns a strong perimeter trio of Buddy Hield, Jordan Woodard and Isaiah Cousins - as well as big man Ryan Spangler. The Sooners have brought in three newcomers to try and fill the power forward void left by the graduation of Cameron Clark and Tyler Neal, but Thomas could fit into that role if he is able to get a waiver.