Eventually he mustered the courage to go back to school , at Marquette University , and in 2012 submitted his Ph. D. dissertation .
After his nine - year NFL career ended in 2000 , Koonce found himself adrift , depressed , lost .
Eventually Koonce mustered the courage to go back to school , at Marquette University , and in 2012 submitted Koonce 's Ph. D. dissertation .
After his nine - year NFL career ended in 2000 , Koonce found himself adrift , depressed , lost .