This is a book about baseball's true 'replacement players.'During the four seasons the U.S. was at war in World War II (1942-1945), 533 players made their major-league debuts. There were 67 first-time major leaguers under the age of 21 (Joe Nuxhall the youngest at 15 in 1944). More than 60 percent of the players in the 1941 Opening Day lineups departed for the service. The 1944 Dodgers had only Dixie Walker and Mickey Owen as the two regulars from their 1941 pennant-winning team. The owners brou