John Joseph Dunn
- Bats Right, Throws Right
- Height 5' 9"
- Debut May 6, 1897
- Final Game October 4, 1904
- Born October 6, 1872 in Meadville, PA USA
- Died October 22, 1928 in Towson, MD USA
Dunn's major league career began in 1897 with the Brooklyn Bridegrooms, where he went 14-9 with a 4.57 ERA in 25 games. Despite his lopsided 16-21 record in 1898, Jack improved to a 3.60 ERA in 41 games. He had his best year in 1899 with a 3.70 ERA in 41 games. Following his success, Dunn struggled moving to 3 teams, the Philadelphia Phillies, the major league Baltimore Orioles, and the New York Giants, where he became primarily a position player.
Dunn retired with a .245 career average, having 1 HR and 164 RBI, a career 64-57 record and 3 saves in 142 games as a pitcher.
In 1907, Dunn returned to the Eastern League Baltimore Orioles, where he became the manager, replacing Hughie Jennings. He bought the team in 1910 and was their manager/owner until his death. He led the Orioles to seven consecutive International League pennants beginning in 1919, a period during which they developed a reputation as the greatest minor league team ever. Dunn died suddenly in October 1928.
Under Dunn's leadership numerous future major leaguers such as Babe Ruth, Lefty Grove, Max Bishop, Tommy Thomas, and George Earnshaw played for the Orioles. Dunn's son Jack Dunn Jr. played under his management in 1914 and grandson Jack Dunn III briefly managed the Orioles as well. In 1950 he was elected to the International League Hall of Fame.
- see also Minor League Wins by a Manager
- 20 Wins Seasons: 1899
- 200 Innings Pitched Seasons: 3 (1897-1899)
- 300 Innings Pitched Seasons: 1 (1898)
Year-by-Year Managerial Record
- Ted Patterson The Baltimore Orioles: Four Decades of Magic from 33rd Street to Camden Yards