[6][7][8] Pratt was the defensive line coach for the Kansas City Chiefs from 1963 to 1977, helping the team win the AFL championship in 1966 and 1969 while also winning Super Bowl IV.
[6] Pratt served as defensive line coach of the Kansas City Chiefs from 1989 to 1994.
[6][9] He served as a football ambassador in Osaka, Japan for the Asahi Challengers of the X-League from 1998 to 1999.
He returned to help the Challengers win the Japan Super Bowl in 2000.
[10][11][6] He had previously spent three years as a defensive coordinator consultant with IMG Academy prior to joining the Cardinals.