News OU, Tulsa extend series By Staff Jun 7, 2008 Norman, Okla. ? Football games in the in-state series between Tulsa and Oklahoma are about to become a more frequent occurrence. The schools announced Friday they would play annual games from 2013 to 2015. PREV POST 6Sports video: Five Jayhawk baseballers drafted NEXT POST 29812OU, Tulsa extend series Show/Post Comments RELATED ARTICLES 10 Best moments of the NCAA tournament in the 21st century Photo Gallery: Jayhawks lose to the Wildcats 81-73 How NFL Bye Weeks Work: A Complete Guide