Nelson rugby league Mason was playing rugby league in the Nelson area. He was a member of the St Mary's club. In 1911 following the tour of Australia with the New Zealand team Mason was selected for the Northern Tour conducted by the
Nelson representative side. He played in 3 matches, the first was against Auckland at Victoria Park before a crowd of 5,000. Auckland won 36–12 with Mason kicking a penalty.{{cite news
International honours He impressed the selectors and was nominated for inclusion in the New Zealand team for Australia by the Nelson union. He was subsequently selected for the
1911 New Zealand tour of Australia and played 4 matches, scoring 2 tries and kicking 2 goals. Prior to departure he made his New Zealand debut in a match against
Auckland at the
Takapuna Racecourse on 10 June. New Zealand won 16–14 with Mason scoring a try.{{cite news ==Personal life==