Charles Joseph Sweeney was an American Major League Baseball pitcher from 1883 through 1887. He played for the Providence Grays, St. Louis Maroons, and Cleveland Blues, and is best known for his performance in 1884, when he won 41 games.

The Providence Grays were a Major League Baseball team based in Providence, Rhode Island who played in the National League from 1878 until 1885. The Grays played at the Messer Street Grounds in the Olneyville neighborhood. The team won the National League title twice, in 1879 and 1884. Following the 1884 season, they won the first World Series over the New York Metropolitans of the American Association. The team folded after the 1885 season.