In 2017, he made his début for the Warrington Wolves against the Castleford Tigers in a 16-36 Super League defeat.[4]
In October 2017, Dagger signed a three-year contract to play for Hull Kingston Rovers in the Super League.[5]
On 15 February 2018, he made his Hull Kingston Rovers Super League bow, in a 23-4 victory over the Catalans Dragons.[6]
Dagger made a total of five appearances for Hull KR in the 2021 Super League season including the club's 28-10 semi-final defeat against Catalans Dragons.[7][8][9]
Dagger occasionally featured for the York City Knights in 2018, as part of Hull Kingston Rovers dual registration partnership with the club.[10]
It was revealed on 26 July 2018, that Dagger would spend the remainder of the 2018 rugby league season at the Leigh Centurions, on a loan basis from his parent-club Hull Kingston Rovers.[11]
Dagger was followed to the Leigh Centurions by two of his current Hull Kingston Rovers teammates in Josh Johnson and Jordan Walne as part of the same loan deal.[11]
Dagger made his Leigh Centurions début against the Sheffield Eagles on 29 July 2018, in a 34-10 triumph in the Championship league competition.[12]
Dagger started the game in the fullback position and he recorded a try on his first appearance for the Leigh Centurions.[12]
On 8 June 2021, it was reported that he had signed for Featherstone in the RFL Championship on loan.[13]
In March 2023, Dagger joined Wakefield Trinity and made his club debut in round 7 of the 2023 Super League season against St. Helens which ended in a 38-0 loss.[14]
In round 18 of the 2023 Super League season, Dagger kicked a drop goal in golden point extra-time which gave Wakefield Trinity a 27-26 upset victory over Wigan.[15]
Dagger played 16 matches for Wakefield Trinity in the Super League XXVIII season as the club finished bottom of the table and were relegated to the RFL Championship which ended their 24-year stay in the top flight.[16]
On 12 October 2023 it was reported that he had returned to play for York Knights on a permanent three-year deal.[17]
On 16 January 2026 it was reported that he had signed for Newcastle Thunder in the RFL Championship on loan
