We'll pretend this never happened

The Cardinals didn't play any baseball yesterday. I know you think they did. You may have watched, listened to or otherwise followed a baseball game that featured decent pitching by the Cardinals Ace, some discipline at the plate when the opposing starter struggled, big hits from Ankiel and Yadi, good defense in the Cardinals outfield, and/or a homerun from Pujols, but none of it actually happened. Can someone please explain this rule to me? An hour of baseball, stricken from the records. Go ahead, look for the box score, you won't find it. When they start play tonight, they start at 0-0, not 5-1. It's just stupid (unless you're a Rockies fan).