Harry Andrew Sullivan (April 22, 1888 – September 22, 1919) was a pitcher in Major League Baseball who played for the St. Louis Cardinals during the 1909 season. He batted and threw left-handed.
Born in Rockford, Illinois, Sullivan attended Saint Louis University. He joined the Cardinals late in the season, appearing for them in two games, including one start. He allowed six runs (four earned) on four hits and two walks for a 36.00 ERA. He did not strike out a single batter in one inning of work and did not have a decision.
Sullivan died in Rockford, Illinois, at the age of 31.