By Ryan AberStaff writer raber@oklahoman.comNORMAN — Caleb Kelly’s OU career might be over. The Sooners linebacker, who came back from a serious knee injury a year ago to play in four games, reportedly suffered a knee injury recently in practice and is presumed to have a torn anterior cruciate ligament, SoonerScoop.com reported. The site also reported that quarterback Tanner Mordecai, who is in a competition with Spencer Rattler for the starting spot, had suffered an injury that would keep him out of practice as well.Read more on NewsOK.com