Jack Reynolds was an English football manager and player. He was the manager of Ajax from 1915 to 1925, 1928 to 1940, and 1945 to 1947. He was one of the pioneers of the Total Football system of playing, and is considered among the best managers the team has had, also influencing Rinus Michels, who made his debut as a player for Ajax under Reynolds. He also managed the Swiss side St Gallen.