Johnson was promoted to the first team ahead of the 2019 after an incredible debut season with the Academy. He joined the Academy from Castleford Lock Lane and only missed one game all season after converting from a half back to hooker.
He was part of the team who played in the Academy Grand Final and was then named in the England Academy side to face the Australian schoolboys. A year earlier Johnson was a try scorer in England Youth’s win over France at the Med-A-Hose Jungle.
In 2018 he agreed a new four year deal, however in 2020 he retired from professional rugby league to pursue other opportunities away from the sport.
He returned to the Rhinos in 2021 and immediately signed for Championship side York City Knights on loan. But Johnson was recalled from that loan spell and added to Richard Agar’s squad for the final two league games of the season.