Colts TE Clark continues to sit out with concussion

TERRE HAUTE, Ind. -- Colts tight end Dallas Clark is expected to miss Friday night's preseason game against Minnesota and could be out until Monday with a slight concussion.

Clark missed his third straight practice Wednesday.

Starting right tackle Ryan Diem also sat out the morning workout after hurting his back. Coach Jim Caldwell says Diem would likely miss a couple of days.

Diem's absence elevated the recently demoted Tony Ugoh into the No. 1 spot on the right side of the line. Ugoh has played exclusively at left tackle since Indy drafted him in 2007.