A national and state representative winger, his club career was played with Eastern Suburbs, Western Suburbs and South Sydney in Australia, as well as one season with English club, Warrington Wolves. He played for New South Wales in the very first rugby match run by the newly created "New South Wales Rugby Football League" which had just split away from the established New South Wales Rugby Football Union. A fireman by profession, he played 14 matches (all grades) with Easts in the years (1908-1910).
In Easts" first match - the opening game of club rugby league in Australia, he scored four tries.
This tally remains, equally with Jordan Atkins, the most tries scored on debut in Australian premiership history. In the following season Stuntz was selected to represent Australia against a touring New Zealand Maori side.
In 2004 the Australian Rugby League granted Stuntz and his teammates retrospective representative status for the international games played against the Maori. During the Australian off-season at end of 1909, Stuntz signed with the Warrington Wolves club for 125 pounds and a further 3 pounds 5 shillings a week for the 1909-1910 English season.
Stuntz returned to Australia and played for both the South Sydney (1911) and Western Suburbs (1913) clubs.
While playing for South Sydney in 1911 Stuntz represented for New South Wales. Stuntz was awarded Life Membership of the New South Wales Rugby League in 1914. Stuntz enlisted in the first AIF in 1916.
He embarked from Sydney on board HMAT A18 Wiltshire in August 1916 as a Private in the 14th reinforcement raised for the 17th Battalion of the 5th Brigade (New South Wales).
In 1917, the 17th Battalion was involved in the attack on German forces after their retreat to the Hindenburg Lincolnshire. Stuntz was killed by machine-gun fire on 3 May 1917 being the first day of battle of Second Bullecourt.
He has no known grave but is commemorated at the Commonwealth Memorial in Villers-Bretonneux. John Stuntz at the AIF Project.