Roy Halladay dies at 40: The world of baseball reacts on Twitter – The Denver Post
Roy Halladay's Top Five Games – M-SABR
13 years ago, Phillies' Roy Halladay pitched 2nd no-hitter in MLB postseason history [video], MLB
Dallas Keuchel Has Near Perfect Game, Minnesota Twins Beat Pittsb
Newhouser, Hal Baseball Hall of Fame
Doc throws 8 2/3 no-hit innings
From the draft to Cooperstown, a Roy Halladay career timeline
Blue Jays broadcaster remembers Roy Halladay as a great baseball player and father
Top 100 MLB players of all time - Nos. 100-51 - ESPN
No-Hitters by Society for American Baseball Research - Ebook