Roy Halladay made history when he threw the first postseason no - hitter since Don Larsen 's World Series perfect game in 1956 .
Roy Halladay already threw one no - hitter in 2010 .
Roy Halladay , who already threw one no - hitter in 2010 , made history when he threw the first postseason no - hitter since Don Larsen 's World Series perfect game in 1956 .