Roger Le Roy Mason (born September 18, 1958 in Bellaire, Michigan) is a retired American professional baseball player who pitched in the Major Leagues primarily in relief from 1984–1987, 1989, and 1991–1994. Mason excelled in the post season where his microscopic ERA of 0.49 over 18 1⁄3 innings is still among the best for relievers.
Mason appeared in the 1993 World Series for the Philadelphia Phillies.
In November 2008, Mason was hired as the pitching coach of the Traverse City Beach Bums of independent baseball's Frontier league. In his initial season as coach, the Beach Bums posted the third lowest earned run average in the league.