 He won the Merseyside Darts Championship no fewer than 8 times in his career and was also Scottish Masters champion in 1981 and 1988.Masson appeared in the BDO World Darts Championship twice, losing in the first round on both occasions.In 1983, he lost 2-1 to Eric Bristow and in 1985 he lost 2-0 to Jocky Wilson.