Texas Tech dismisses top returning tackler Dakota Allen

Texas Tech linebacker Dakota Allen, right, would have been the team's best returning tackler. Jerome Miron/USA TODAY Sports

Texas Tech has removed sophomore linebacker Dakota Allen from the team "due to a failure to uphold student-athlete expectations," the school announced.

Allen was the Red Raiders' top returning tackler from last year's team. That's a blow for a defense that ranked next-to-last in the country in stopping the run in 2015.

Texas Tech also dismissed reserve offensive linemen Robert Castaneda and Trace Ellison.