Willy Robinson will not return next season as Arkansas' defensive coordinator, the school said Tuesday.

"I want to thank Willy Robinson for his role in helping our defense, which he leaves in better shape than when he arrived," coach Bobby Petrino said in a prepared statement. "I have the utmost respect for Willy Robinson as an individual who wants the best for the young men he coaches. I give Willy credit for his part in the building process the last four years and wish him future success."