"That would essentially be the high point of Karras' three-year tenure, with a developing movie career often distracting him from showing any improvement (in reality, Sistrunk did not attend any college but enlisted in the United States Marine Corps after high school and played semi-professional football before getting a tryout with the Raiders; the Raiders team guide listed his college alma mater as "U.S. Mars").Meredith returned to the ABC booth in 1977, but seemed to lack the enthusiasm that had marked his first stint from 1970 to 1973.