Uniform number (Major League Baseball) - Wikipedia
Roy Halladay Baseball Trading Card Database
Roy Oswalt 2003 Upper Deck Game Face Gear Game Used Jersey Card
Calaméo - Huggins and Scott Summer 2023
In 2006, I went to a Jays-Yankees game started by Roy Halladay and
Baseball - Hall of Fame Players - Post War Autographs: GP's Hall
Near mint condition card.
2006 Upper Deck Baseball Roy Halladay Diamond Stars Card #DS-33
Lot Detail - 2011 Roy Halladay Game Used and Signed Philadelphia
Roy Halladay 2006 Upper Deck Game Used Jersey Card