(AP) - West Virginia coach Dana Holgorsen says defensive coordinator Keith Patterson has voluntarily left the football program.
Holgorsen thanked Patterson for his two years with the team and says "we wish him nothing but the best."
The school announced Patterson's departure without elaborating Thursday and declined further comment.
Patterson's departure comes a day after the Mountaineers signed 21 football recruits, including nine on defense.
Patterson spent one season as defensive coordinator after arriving at West Virginia in 2012 and serving that season as co-coordinator and linebackers coach.
The 2013 defense was the worst in the Big 12 in passing yards and touchdown passes allowed and had the second-fewest sacks in the league
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