John Duncan "Long John" Henderson - Born March 25, 1933 in Toronto, Ontario - Died October 4, 2024 in White Rock, British Columbia was a Canadian ice Hockey goaltender.

- World Ice Hockey Champion 1958 with Whitby Dunlops.
- J. Ross Robertson Cup (senior) Champion 1957 and 1959 with Whitby Dunlops.
- Allan Cup Champion 1957 and 1959 with Whitby Dunlops.

- Lester Patrick Cup Champion 1966 with Victoria Maple Leafs.

- Calder Cup Champion 1969 with Hershey Bears.
- F. G. "Teddy" Oke Trophy Champion 1969 with Hershey Bears.

Henderson made his NHL debut on November 17, 1954 with the Boston Bruins vs the New York Rangers in a 2-2 tie at Madison Square Garden.

1st NHL win on November 18, 1954 vs Chicago Black Hawks 5-1 at Chicago Stadium.

1st NHL Shutout on November 20, 1954 vs Toronto Maple Leafs 1-0 at Maple Leaf Gardens.

After his stint with the Boston Bruins, Long John played for the Whitby Dunlops, helping them win 2 Allan Cup championships and a world championship.

Long John retired for a few seasons from 1961 to 1964, but was convinced to play again.

Long John finished his Hockey career with the Hershey Bears from 1967 to 1969, winning the Calder Cup.