The Kansas City Monarchs, the Chicago American Giants, the St. Louis Stars, the Birmingham Black Barons, the Homestead Grays, and the Indianapolis Clowns; for over fifty years, they were the Yankees, Cardinals, and Red Sox of black baseball in America. And for over a decade beginning in the late 1940s, umpire Bob Motley called balls and strikes for many of their games, working alongside such legends as Satchel Paige, Hank Aaron, Ernie Banks, and Willie...