The 19-year-old spent time on loan at the Memorial Ground last season from parent club Hull Kingston Rovers.
Hailing from Humberside and beginning his rugby league career at West Hull, Rusling caught the eye of Super League outfit Castleford Tigers and subsequently moved to the Jungle on scholarship terms.
Rusling then progressed to the Tigers’ academy set-up and regularly trained with the first team. During the 2021 Super League season, Rusling made his top-flight bow for the Tigers against Salford Red Devils but moved back to his native Hull with Rovers a year ago.
Playing mainly in the Robins’ reserve side during the last campaign, Rusling gained valuable first team experience with Cornwall and scored four tries during the club’s inaugural professional campaign.
Released by Rovers after just one season at Craven Park, Cornwall moved quickly to secure Rusling’s services for 2023.