Willy Robinson out at Arkansas

Arkansas defensive coordinator Willy Robinson will not return to the Razorbacks in 2012, multiple sources told ESPN.com.

Robinson was Arkansas' defensive coordinator for four years under head coach Bobby Petrino. This season, the Razorbacks ranked no higher than eighth in seven defense categories, including ranking eighth in scoring defense (22.8 points per game) and ninth in total defense (371.4).

Arkansas released a statement from Petrino on Robinson:

“I want to thank Willy Robinson for his role in helping our defense, which he leaves in better shape than when he arrived. 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.”

Robinson is the third coaching change for Arkansas this week. Monday, UAB introduced former Arkansas offensive coordinator Garrick McGee as its new head coach. Tuesday, Arkansas announced that Petrino's younger brother, Paul Petrino, will return to the staff as offensive coordinator and quarterbacks coach after spending the last two years as the offensive coordinator at Illinois.

Also, special teams coordinator and outside linebackers coach John L. Smith took the head-coaching job at Weber State.