In late 2010, when Arthars was 12, his family moved to Gold Coast, Queensland, where he attended Keebra Park State High School and played junior rugby league for the Helensvale Hornets.

[citation needed] From 2016 to 2017, Arthars played for the Melbourne Storm in the Holden Cup, scoring 22 tries and kicked 160 goals for 408 points in 44 games.

In Round 22 of the 2019 NRL season, Arthars scored his first try for the Gold Coast in a 36-12 loss against Parramatta at Cbus Super Stadium.

In the 2020 NRL season, Arthars played six games for Brisbane scoring 1 try as the club claimed the wooden spoon by finishing last on the table.

[9] He played 12 games, scoring 5 tries for the Warriors in 2022.. Arthars experienced a breakout season with the Brisbane in 2023 as he cemented a starting position on the team and was the preferred wing option over veteran Corey Oates.