[citation needed] In 2016 he was called up to the Ireland squad for the 2017 Rugby League World Cup European Pool B qualifiers.

[6][7] He played in the 2016 Super League Grand Final defeat by the Wigan Warriors at Old Trafford.

[10] In September 2020 the club web site announced the signing of King from Wakefield Trinity[11] King played a total of 20 games for Hull KR in the 2021 Super League season including the club's 28-10 semi-final loss against the Catalans Dragons.

[12][13][14] On 12 August 2023, King played for Hull Kingston Rovers in their 17-16 golden point extra-time loss to Leigh in the Challenge Cup final.

[15] King played 27 games for Hull Kingston Rovers in the 2023 Super League season as the club finished fourth on the table and qualified for the playoffs.