Michael Joseph "Mickey" Doolin (May 7, 1880 in Ashland, Pennsylvania – November 1, 1951 in Orlando, Florida) was a professional baseball player who played shortstop in the Major Leagues from 1905 to 1918. During his career, he played for the Philadelphia Phillies, Baltimore Terrapins, Chicago Whales, Chicago Cubs, New York Giants, and Brooklyn Robins. His name is often misspelled as "Doolan" due to many of his baseball cards being misspelled.