Some surmise Joe Castiglione is retiring because college athletics is so demanding. Check out what he had to do when he first took over at OU.

Oklahoma athletic director Joe Castiglione, who has led the Sooners since 1998, will retire from his full-time responsibilities during the upcoming school year, the university announced Monday. Castiglione and other members of Oklahoma's administration will hold a news conference Tuesday.

OU's Joe Castiglione will step away from his full-time role after 28 years, but is staying on as athletic director emeritus upon the school's hiring of his replacement, The Oklahoman confirmed Monday.