John Joseph Dunn (October 6, 1872 – October 22, 1928) was an American pitcher and infielder in Major League Baseball at the turn of the 20th century who later became a minor league baseball club owner.
Early life and playing career
thumb|right|125px|1904 baseball card
Dunn was born in Meadville, Pennsylvania, and grew up in Bayonne, New Jersey. When he was nine, a boxcar ran over his left arm while playing at a local railway. He was told by doctors that his arm had to be either amputated or risk death. He declined an amputation, but his arm was left crippled from above the elbow and couldn't lift the arm above his neck.
In 1896 Dunn played for Toronto in the Eastern League, and the following year he reached the major leagues as a pitcher for the Brooklyn Bridegrooms. He bounced around the majors for seven years, having one good season with the Bridegrooms in 1899, with a 23–13 record. When he wasn't playing, Dunn studied how the game worked from the sidelines. He was also a third baseman and shortstop. After 1904, he pitched and managed in the minors for a few seasons, winning an International League pennant in 1905.
Minor league ownership
In 1907, Dunn took over as manager of the Baltimore Orioles, a minor league club with no connection to the current major league team by that name. He bought the team on November 16, 1909, for $70,000. He allegedly received a $10,000 loan from Philadelphia Athletics owner/manager Connie Mack. He developed a minor league powerhouse by scouting and developing his own players. He allegedly signed players by how they looked instead of skill, sometimes never seeing a player play before offering a contract. Dunn's grandson, Jack Dunn III (1921-1987), managed the club in 1949.
Dunn ran the Orioles until his death from a heart attack in Baltimore on October 22, 1928.