World Baseball Classic Power Rankings: Who's No. 1? - ESPN
Randy Johnson Through The Years - Sports Illustrated
2005 Topps Baseball #332 Randy Johnson Throws Perfect Game Card at 's Sports Collectibles Store
Randy Johnson, Baseball Cards Wiki
On This Date in 2004, Randy Johnson Brought “Big Unit Energy” to the Mound and Pitched a Perfect Game
All-time perfect games
MLB Perfect Games
Randy Johnson threw the 17th perfect game ever on this day in sports history - Sports Illustrated
Jim Bunning's perfect game - Wikipedia
May 18, 2004: Randy Johnson pitches a perfect game at age 40 – Society for American Baseball Research