 It was revealed on 10 October 2018, that Donaldson would be departing Hull Kingston Rovers following a restructure of the club's on field personnel.Donaldson appeared on only one occasion for the York City Knights on 11 March 2018, four-days later he made his long-awaited return to the Hull Kingston Rovers' fold, following his long-term ACL knee injury that he sustained the season prior.Donaldson scored for the York City Knights on a single dual-registration appearance, in a 22-24 victory over Oldham.