Irish teenager Curtis joined the Blades on a long-term deal until the summer of 2027 following the expiry of his association with St Partick's Athletic in the League of Ireland.

Born in Navan, Curtis was on the books at Shamrock Rovers before moving to St Pats in August 2021, where he became their youngest ever player at 15 years and 255 days old.

The Republic of Ireland youth international picked up the PFAI Young Player of the Year award in 2023 having made 39 senior appearances and helped the Saints win the FAI Cup.