Dudson began his career at Celtic Crusaders, where he progressed through the youth ranks. He made his Super League debut in the 2009 season in a fixture against Leeds. Dudson spent 2010 on loan at South Wales Scorpions, and was named in the Championship 1 team of the year at the end of the season. He returned to Crusaders in 2011 and made 12 further appearances for the club. At the end of the season, he joined Wigan Warriors along with international team-mate Ben Flower.