On June 20, 2004, Cincinnati Reds center fielder Ken Griffey Jr. joined one of Major League Baseball's most prestigious fraternities: the ''500 Home Run Club.'' His name will forever be alongside Hall-of-Fame greats like Hank Aaron, Babe Ruth, Willie Mays, Harmon Killebrew, Mike Schmidt, Jimmie Foxx, Mickey Mantle and Ted Williams. In 2007, he hopes to crack the magical 600-HR plateau. Collectors can now own a piece of baseball lore by purchasing this Interleague baseball signed by Junior himself. The item is authenticated by UDA.