Don Lafferty (1933–1998) was a Grandmaster checkers (British English: draughts) player.
In 1982 he defeated Derek Oldbury for the World GAYP (Go as you please) championship with a score of 1-0-23.
He was challenged for the championship in 1984 by Paul Davis, winning easily 5-0-15.
In 1986 he defended his title again by drawing James Morrison with a score of 0-0-24 and in 1989 he defeated Elbert Lowder 4-3-16.
This served him well in his primary career as a high-school math and physics teacher until he retired in 1988.