McGinnity began his professional career in 1899 with the Baltimore Orioles of the National League. He pitched for the Orioles for two seasons before moving on to the Brooklyn Superbas in 1901. He enjoyed his most successful season in 1902 when he posted a record of 28-8 with a 2.43 ERA. He was also named to the National League All-Star team that season.
McGinnity was traded to the New York Giants in 1903 and he continued to be a dominant force in the National League. He was a key contributor to the Giants' 1904 pennant-winning season, posting a record of 22-9 with a 2.43 ERA. He was also named to the National League All-Star team for a second time that season.
McGinnity's career began to decline in 1905 and he was traded to the St. Louis Cardinals in 1906. He pitched for the Cardinals for two seasons before retiring in 1908. During his career, he won 246 games and posted a 2.66 ERA. He was also known for his durability, pitching over 400 innings in a season on multiple occasions.
Joe McGinnity was a dominant pitcher during his career and was one of the most successful pitchers of his era. He was known for his durability and ability to pitch both sides of a doubleheader. He was a two-time National League All-Star and was a key contributor to the New York Giants' 1904 pennant-winning season. He retired in 1908 with 246 career wins and a 2.66 ERA.
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