Charles Oscar Finley (February 22, 1918 – February 19, 1996), nicknamed Charlie O or Charley O, was an American businessman who owned Major League Baseball's Oakland Athletics. Finley purchased the franchise while it was located in Kansas City, moving it to Oakland in 1968. He is also known as a short-lived owner of the National Hockey League's California Golden Seals and the American Basketball Association's Memphis Tams.