Leading up to the 2025 season, Sooners on SI counts down five true freshmen who could make an impact for Oklahoma in the fall ...

Joe Castiglione, left, and former Oklahoma football coach Bob Stoops listen as OU President David Boren announces his retirement in 2017.

Joe Castiglione is set to retire after a historic tenure as OU's athletic director. Here's a look back at some of his ...