Early career In 2014 and 2015, Marshall-King played for the Wests Tigers'
NYC team, before graduating to their
Intrust Super Premiership NSW team in 2016.
Wests Tigers 2017 In round 26 of the
2017 NRL season, Marshall-King made his
NRL debut for the Tigers against the
New Zealand Warriors. He spent the majority of 2017 playing for the Tigers in the Intrust Super Premiership NSW competition, making 19 appearances in a side that finished last on the table. In November, he signed a two-year contract with the
Canterbury-Bankstown Bulldogs starting in 2018.
Canterbury-Bankstown Bulldogs 2018-2022 In round 1 of the
2018 season, Marshall-King made his club debut for the Canterbury-Bankstown Bulldogs against the
Melbourne Storm, coming off the bench at hooker in the Bulldogs' 18–36 loss at
Perth Stadium. In round 3, he earned the starting spot at five-eighth. Marshall-King played 23 games for Canterbury in the
2019 NRL season as the club finished 12th on the table. He made twenty appearances for Canterbury in the
2020 NRL season. The club finished in 15th place on the table, only avoiding the
wooden spoon by for and against. Marshall-King made a total of nine appearances for Canterbury in the
2021 NRL season as the club finished last and claimed their sixth wooden spoon.
Dolphins 2023-present Marshall-King signed a two-year deal with the newly admitted
Dolphins. In round 1 of the
2023 NRL season, he made his club debut for the Dolphins as hooker in their inaugural game in the national competition, when they pulled off a major upset defeating the
Sydney Roosters 28–18 at
Suncorp Stadium. In total, Marshall-King played fifteen games and scored two tries for the Dolphins in 2023. He played a total of seventeen games for the Dolphins in the
2024 NRL season as the club finished 10th on the table. on 18 June, Marshall-King re-signed with the club until the end of 2028. Marshall-King played nineteen matches for the Dolphins in the
2025 NRL season as the club narrowly missed out on the finals, finishing 9th. On 9 January 2026, Marshall-King was ruled for up to 3 months after suffering a knee injury at home. == Statistics ==