Texas Tech defensive coordinator Matt Wallerstedt has resigned for unspecified personal reasons.
Wallerstedt said in a statement issued by the university Thursday that he was stepping side "because I want the best for the Red Raider program, and this will allow them to go in a different direction on defense."
Mike Smith, who shared the coordinator title with Wallerstedt, will be in charge of the defense for the rest of the season.
The 48-year-old Wallerstedt joined the staff when former Texas Tech quarterback Kliff Kingsbury was hired as coach last year. They were on the staff together at Texas A&M in 2012.
The Red Raiders (2-1), who are coming off a 49-28 loss at home to Arkansas, open Big 12 play at Oklahoma State next Thursday.
Copyright AP - Associated Press
