He graduated with Souths in 1908, the first season of rugby league in Australia and made his debut in the first-grade team in 1909.

Hallett's final year as a member of the national team was in 1914 when the Northern Union toured Australia.

[5] In a game against Western Suburbs in 1924, Hallett was involved in a heavy collision, fracturing his jaw.

The final two games of the season were cancelled as Souths sat at the top of the ladder, ten points ahead of their nearest rival.

A four-team semi-finals series, along with other rule changes to speed up the game, was introduced in 1926 in an effort by the NSWRL to attract crowds back to the matches.