He signed with the Newark Eagles in 1937, playing under another name to protect his amateur standing, since he was in college. Irvin was a power hitter who also hit for high average, [winning] two batting titles in the Negro National League. . . . [He spearheaded the Eagles' 1946 victory] in the Negro World Series. . . .
A versatile player, he played both infield and outfield with the Eagles. . . . In 1939, he hit .403 with good power, and followed with strong seasons of .377 and .400. {A contract hassle led him to go to Mexico in 1942, where he led in average (.397) and home runs (20), finished second in RBIs (79) in only 63 games, and won the MVP award. {Then . . . he was drafted . . . spending three years in military service. . . .
After his three-year hiatus from baseball, Irvin felt a need for additional winter ball to work back into his prewar condition, and resumed pley in Latin America. Irvin [played on champions in both Cuba and Puerto Rico}. He posted a lifetime .355 average in Puerto Rico.. . .
Before the war Irvin had been the Negro League owner's choice for the player to be the player to break the color line [but because of the war, Jackie Robinson became the one to do so].