[4] During 2022 and 2023, Plath played seventeen games, scored nine tries and kicked nineteen goals for the Wynnum Manly Seagulls in the Hostplus Cup.
[6][7] During 2023, Plath played fifteen games and scored six tries for the Redcliffe Dolphins in the Hostplus Cup competition run by the Queensland Rugby League (QRL).
[8] On 2 June 2023 in round 14 of the 2023 NRL season, Plath made his first grade debut from the bench in their 8-30 loss to the New Zealand Warriors at Mount Smart Stadium.
[10] In round 4 of the 2024 NRL season, Plath was placed on report for a hip drop tackle during the clubs 30-14 victory over the Gold Coast Titans.
[12] He played a total of 21 games for the Dolphins in the 2024 NRL season as the club finished 10th on the table.