Daniel Joseph Cotter (April 14, 1867 – September 4, 1935), was a Major League Baseball pitcher who played with the Buffalo Bisons of the Players' League in 1890. Cotter played in one game for the Bisons on July 16, 1890. He pitched a complete game, but allowed 18 hits, 7 base on balls, and 14 earned runs. He also went hitless at the plate in four at bats. Buffalo lost the game 19-0. Cotter later played for the Lewiston, Maine ballclub of the New England League in 1892.