Bill Heindl was a remarkable all-round athlete, gifted in any sport he played, but he excelled in three: football, baseball and hockey. A product of St. Paul's College High School, he won a school championship in football in 1939, played juvenile hockey in 1939-40, and was a junior champion in baseball in 1940. In 1942 he followed his high school football coach, Greg Kabat, to Vancouver to play for the Grizzlies. Heindl's baseball highlights included playing for the Norwood Seniors of the Winnipeg League in 1941, and with Canadian Navy in the Senior League in 1943.
But it is in the sport of hockey that Heindl enjoyed his greatest success as an athlete. He won a Memorial Cup with the Winnipeg Rangers in 1940-41 and then moved to the Portage Terriers for the following season. Heindl won a second consecutive Canadian junior title when the Terriers won the Memorial Cup in 1941-42. Bill Heindl Sr. went on to play professional hockey in the Quebec League and for Saskatoon in the Western League.