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Arizona's Rich Rodriguez makes changes to defensive staff

TUCSON, Ariz. -- Defensive coordinator Jeff Casteel and defensive line coach Bill Kirelawich are not returning to Rich Rodriguez's staff at Arizona.

Casteel, who also coaches linebackers, joined the Wildcats in 2012 after serving as West Virginia's defensive coordinator from 2003 to 2011. Two of those seasons came when Rodriguez was the Mountaineers' head coach.

Casteel has more than 30 years' coaching experience, including a stop at UTEP.

Kirelawich spent four seasons at Arizona after working for more than three decades as a defensive coach at West Virginia.