C.A.: 1993 Upper Deck Pat Mahomes
Roy Halladay remembered as 'the real deal' at public memorial
May 29, 2010: 27 up and 27 down for Phillies' Roy Halladay – Society for American Baseball Research
2013 Emerald Guide To Baseball PDF, PDF, National League
Mourning Roy Halladay, a Master Who Craved the Big Moments - The New York Times
Remembering Legend Roy Halladay. One of the most dominant pitchers of…, by Riley Poole
First Time Candidates on the 2019 BBWAA Hall of Fame Ballot - Cooperstown Cred
First Time Candidates on the 2019 BBWAA Hall of Fame Ballot - Cooperstown Cred
AHBL Press Releases
2012 Postseason Media Guide - MLB.com
10/6/2010: Roy Halladay throws a no-hitter in his first postseason appearance