Arthur Albert Irwin, 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.

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.