Roy Halladay's debut in September of 1998 was recently ranked as the 'Best September Call Up' in franchise history.
As August draws to a close, the last full month of the MLB regular season brings with it an interesting wrinkle. Rosters expand in September, allowing teams to call up players, some of whom will be getting their first taste of Major League action. Recently, MLB.com listed the best September call ups in each teams history and for the Blue Jays they landed on a player who would go on to have a Hall of Fame career.