When Sandy Koufax threw his perfect game on September 9th, 1965 he obviously had 27 batters up and 27 batters down. An amazing feat of pitching in any era. What makes this game even more unbelievable is that the opposing Cubs pitcher, Bob Hendly, threw a one hitter allowing only one unearned run. The one hit he gave up ended up left stranded on base.
In all of baseballs recorded history that game was the ONLY true one hitter. It was also the only game in history where only one runner was left on base.
So in all it wasn't just 27 up, 27 down it was actually 56 up and 54 down. In my humble opinion that was the greatest game ever pitched.
Drew
http://www.baseball-reference.com/bo...96509090.shtml