Sculthorpe played for St Helens as a in their 1999 Super League Grand Final victory over Bradford Bulls. Having won the 1999 Championship, St. Helens contested in the 2000 World Club Challenge against National Rugby League Premiers Melbourne Storm, with Sculthorpe playing as a loose forward in the loss. He also played for St Helens at loose forward and kicked a drop goal in their 2000 Super League Grand Final victory over Wigan. As Super League V champions, St Helens played against 2000 NRL Premiers Brisbane Broncos in the 2001 World Club Challenge. Sculthorpe played at loose forward, scoring a try and kicking a drop goal in Saints' victory.