Arthur Albert Irwin (February 14, 1858 – July 16, 1921), nicknamed "Doc", "Sandy", "Cutrate" or "Foxy", was a Canadian-American shortstop and manager in Major League Baseball (MLB) during the late nineteenth century. He played regularly in the major leagues for eleven years, spending two of those seasons as a player-manager. He played on the 1884 Providence Grays team which won the first interleague series to decide the world champions of baseball. Irwin then served as a major league manager for several years.