Albert Joseph "Smiling Al" Maul (October 9, 1865 – May 3, 1958) was an American professional baseball player.

He was a pitcher and outfielder over parts of 15 seasons (1884–1901) in Major League Baseball with the Philadelphia Keystones, Philadelphia Quakers/Phillies, Pittsburgh Alleghenys, Pittsburgh Burghers, Washington Senators,[1] Baltimore Orioles, Brooklyn Superbas, and New York Giants.

He led the National League in earned run average in 1895 while playing for Washington.

At the time of his death, Maul was the last surviving participant of the Union Association.

This biographical article relating to an American baseball pitcher born in the 1860s is a stub.