Ira James Flagstead (September 22, 1893 – March 13, 1940), sometimes known as "Pete", was an American baseball player. He played 15 years of professional baseball, principally as an outfielder, including 13 years in Major League Baseball with the Detroit Tigers (1917, 1919–1923), Boston Red Sox (1923–1929), Washington Senators (1929), and Pittsburgh Pirates (1929–1930). In 1,218 major league games, Flagstead compiled a .290 batting average with a .370 on-base percentage.