When was the former American college football coach which  Bruce Chambers was his stff born 
Bruce Chambers (American football):  He most recently served as an assistant to Charlie Strong at the University of Texas at Austin, and was the only member of the coaching staff retained from Mack Brown's staff. Mack Brown: William Mack Brown (born August 27, 1951) is a former American college football coach.
August 27, 1951