It looks like he was on scholarship at SMU and decided to walk-on at K-State.
http://www.kansascity.com/165/story/338482.html
The Kansas City Star
Defensive end Cox has earned K-State’s respect
By HOWARD RICHMAN
The Kansas City Star
MANHATTAN, Kan. | The media swarmed Kansas State senior defensive end Clayton Cox on Monday. Teammate Steven Cline, just outside that scrum, listened with a mischievous grin.
“I just want to hear him,â€