[1] He won a gold medal in the 4 × 200 m freestyle relay at the 1912 Summer Olympics in Stockholm, Sweden as part of a combined team with Australia, competing as Australasia.

[7] Champion was suspended at the end of 1902 by the national swimming association for failing to pay registration fees and was allowed to re-enter the sport in the southern summer of 1907–08.

He had also represented Australasia at the 1911 Festival of Empire at The Crystal Palace, an early forerunner to the Commonwealth Games, where he pulled out of the mile race.

In the 1500 m event, he placed second in both his heat and semifinal, before abandoning in the final after 600 m. An ear infection to Bill Longworth resulted in Champion being promoted to the 4 × 200 m freestyle relay team.

Les Boardman extended the lead to 15 m before Harold Hardwick held off Duke Kahanamoku to claim the gold medal in the world record time of 10:11.6.