John Templeton was born in Scotland. He was a cousin of Scottish international outside right Bobby Templeton.

Trainer of the soccer version of the Toronto Maple Leafs in the National Soccer League in the 1930’s.

Jack was for many years Ulster United’s trainer, including the 1946 season when the Redhanders won the Dominion Championship, the Ontario Major Soccer League championship, the Toronto City Cup, Dunlop Rubber Cup and the Harris Cup.