Fielden played for the Bradford Bulls from the interchange bench and scored a try in their 2001 Super League Grand Final victory against the Wigan Warriors. As Super League VI champions, the Bradford Bulls played against 2001 NRL Premiers, the Newcastle Knights in the 2002 World Club Challenge. Fielden was selected for the interchange bench in Bradford Bulls' victory. He also played for Bradford Bulls at front row forward in their 2002 Super League Grand Final loss against St. Helens. Fielden played for the Bradford Bulls at prop forward in their 2003 Super League Grand Final victory against the Wigan Warriors. Having won Super League VIII, Bradford Bulls played against 2003 NRL Premiers, the Penrith Panthers in the 2004 World Club Challenge. Fielden played as a prop forward in the Bradford Bulls' 22–4 victory. He also played for Bradford Bulls at prop forward in their 2004 Super League Grand Final loss against the Leeds Rhinos. Fielden was selected in the Great Britain team to compete in the end of season 2004 Rugby League Tri-Nations tournament. In the final against Australia he played at in the Lions' 44–4 loss.