When Jackie Robinson was penciled into the lineup for the Brooklyn Dodgers in 1947, America's national pastime and America's future changed forever. How much is reflected in a remark Martin Luther King Jr. made to Don Newcombe: "You'll never know what you and Jackie and Roy did to make it possible to do my job." Red Barber was perfectly situated to observe this drama. Broadcaster for the Dodgers, friend of Branch Rickey-who confided in him before...