An outstanding pitcher, John posted a pitching record of 24-6 while playing for the St. Boniface Legionnaires from 1971-73. He was considered one of the premier pitchers in the Redboine Senior League, and was selected to play on the Manitoba All-Stars team in 1978. The All-Stars were crowned Western Canadian Champions that year. During one memorable provincial tournament in Carberry, John pitched two nine-inning games with a torn rotator cuff, leading his team to a win both times. In 1971, he helped start the St. Boniface Legionnaires Junior Baseball Club and was a founding member of the St. Boniface Native Sons in 1975.