Joseph Lawrence Stewart (March 11, 1879 – February 9, 1913), nicknamed "Ace", was a Major League Baseball pitcher who played in 1904 with the Boston Beaneaters. He batted and threw right-handed. Stewart had a 0-0 record, with a 9.64 ERA, in 2 games, in his one-year career.
He was born in Monroe, North Carolina and died in Youngstown, Ohio.