Haddon had been picked to tour Australia with the New Zealand team in June and July 1919 but due to circumstances was unable to make the trip. He was however selected for the 3rd and 4th tests against the touring Australian team in August/September. On September 6, Tom Haddon became Kiwi number 136 when he played lock in front of 24,300 spectators at the Auckland Domain. New Zealand were defeated 34 to 23. In the third test also played on the Domain, New Zealand was heavily beaten by 32 points to 2 with Haddon moving into the prop position.
