Kansas City Chiefs assistant coach history

Tommy O'Boyle

O'Boyle was the assistant coach for the Kansas City Chiefs in the 1966-1974 seasons, a total of nine years. O'Boyle's record as the team's assistant coach was 80-40-6, making him the second-most successful assistant coach in Kansas City Chiefs history. The team made it to the playoffs four times (1966, 1968-1969, 1971) and had a 4-3 record under Coach O'Boyle in playoff games. In 1966, the Kansas City Chiefs faced off against the Green Bay Packers in Super Bowl I and the Chiefs, under the direction of head coach Hank Stram, lost 10-35. In 1969, the Kansas City Chiefs faced off against the Minnesota Vikings in Super Bowl IV and the Chiefs, under the direction of head coach Hank Stram, won 23-7.

Morton J. "Chuck" Mills

Mills was the assistant coach for the Kansas City Chiefs in the 1966 season. Mills' record as the team's assistant coach was 11-2-1, making him the most successful assistant coach in Kansas City Chiefs history. The team made it to the playoffs one time (1966) and had a 1-1 record under Coach Mills in playoff games. In 1966, the Kansas City Chiefs faced off against the Green Bay Packers in Super Bowl I and the Chiefs, under the direction of head coach Hank Stram, lost 10-35.


Kansas City Chiefs assistant coach record

Coach Years Record Win percentage Playoff record
Tommy O'Boyle 1966-1974 80-40-6 65.9% 4-3
Morton J. "Chuck" Mills 1966 11-2-1 82.1% 1-1

Kansas City Chiefs assistant coach facts

  • Tommy O'Boyle and Morton J. "Chuck" Mills was the first assistant coach in Chiefs history in 1966.
  • Tommy O'Boyle coached the most seasons as the Chiefs's assistant coach at nine seasons.
  • Tommy O'Boyle was the last coach to hold the position of assistant coach, leaving the role after the 1974 season.