Randy Johnson had pretty much done it all -- Cy Young Awards, a no-hitter, strikeout records, a World Series championship. Only one thing was missing in his brilliant career, that rarest of pitching feats. At the ripe ol' age of 40, the Big Unit took care of that, too. Johnson became the oldest pitcher in major league history to throw a perfect game, retiring all 27 hitters to lead the Arizona Diamondbacks over the Atlanta Braves 2-0 ...