[4] Although his season was cut short after suffering a bowel injury,[7] he received another nomination for the Young Player of the Year,[8] and was this time voted as the winner of the award.

[9] He played for St Helens in their 8-4 2020 Super League Grand Final victory over Wigan at the Kingston Communications Stadium in Hull.

[12] On 24 September 2022, Lees scored the fastest try in Super League Grand Final history after crossing over in the second minute of play during St Helens 24-12 victory over Leeds in the decider.

Lees played in St Helens narrow loss against the Catalans Dragons in the semi-final which stopped them reaching a fifth successive grand final.

[15] Lees played 25 matches for St Helens in the 2024 Super League season which saw the club finish sixth on the table.