Roy Halladay - Wikipedia
MLB Nears 10 Years Without a Perfect Game - The New York Times
Roy Halladay's perfect game - Wikipedia
Armando Galarraga's near-perfect game - Wikiwand
List of Major League Baseball perfect games - Wikipedia
Roy Halladay
Roy Halladay News, Photos, Quotes, Video
Ten years later, Roy Halladay's perfect game lives on with the Phillies, Marlins, and so many others who were there
Relive Roy Halladay's perfect game in book excerpt
Why has it been so long since an MLB pitcher has thrown a perfect game? - Quora
Roy Halladay - Phillies Perfect Game Info-graphic