He previously played for the Manly Warringah Sea Eagles, Sydney Roosters and the Wests Tigers in the NRL, and the Salford Red Devils and the Wigan Warriors in the Super League.

[7] On 27 August 2013, Hastings signed with the Sydney Roosters on a 3-year contract,[8][9] rejecting offers from St. George Illawarra, North Queensland Cowboys and Newcastle Knights.

This culminated as Hastings was demoted to reserve grade with the Wyong Roos after he had disciplinary problems and also falling out with senior players at the club.

[18] At the start of the 2018 season, Hastings was involved in a well publicised falling out with fellow Manly player Daly Cherry-Evans and coach Trent Barrett.

[22][23] On 8 July 2019, Hastings was announced to have signed a 2-year deal with Super League side Wigan, effective from the start of the 2020 season.

[24] Hastings was part of the Salford side which reached the 2019 Super League Grand Final but were defeated 23-6 by St Helens at Old Trafford.

[29] In round 7 of the 2021 Super League season against Salford, Hastings kicked a field goal to win the match for Wigan 17-16.

[31] In round 6, Hastings helped the Wests Tigers to their first win of the 2022 season, kicking a 38 metre field goal to break a 20-all deadlock against Parramatta with seconds left remaining in the match.

[32] On 31 July 2022, Hastings was ruled out for the remainder of the 2022 NRL season after suffering a broken ankle in Wests Tigers upset victory over Brisbane.

[35] In November 2022, Hastings was released from the final year of his Wests Tigers contract and signed a three-year deal with the Newcastle Knights.

Hastings played in the clubs elimination final victory over Canberra but missed the following week against the New Zealand Warriors in which Newcastle's season was ended.

[39] After Newcastle lost the opening two matches of the 2024 NRL season, Hastings was demoted to reserve grade and replaced with Jack Cogger.