Mason enjoyed his best achievement in the 1999 BDO World Championship, when he recovered from 1-4 down in sets in his best-of-nine quarter-final match against Martin Adams, survived many match darts against him before eventually winning 5-4 in sets, winning by 6-4 in legs in the deciding set.
Mason's last appearance at Lakeside was a first round defeat to Mervyn King in 2001.