i have heard this before and i'm not sure if it is true or not. if a pitcher gives up zero hits, zero walks, and a runner reaches on an error, but that runner is immediately picked off or the next hitter grounds into a double play is it a perfect game? the pitcher has given up zero hits, zero walks, and sits down 27 straight. this kind of applies to last night because buehrle did sit down 27 straight, although it was a walk so obviously it couldn't be a perfect game.