Oklahoma athletic director Joe Castiglione has announced that the upcoming academic year will be his last in charge of the department, with an official retirement planned for June 2028.

Castiglione is entering his 28th year at Oklahoma, making him the longest-tenured athletic director in major college sports.

The announcement of Joe Castiglione's retirement sent shockwaves through college athletics and here's are some of the best social media reactions.