I forgot about the Kerry Wood game. Even deducting 1 point for the HB, it's still probably the highest 9 inning game score in history.

Both games are impressive in their own way. A perfecto for Johnson, yet a 20 strikeout game is even rarer than a perfect game. And a one-hitter besides.

I checked the original Bill James essay in which he introduced Game Scores. Nothing mentioned about a deduction for hitting a batter, which was surprising since it certainly has at least the same negative value as a walk.