There have been 18 perfect games since 1900. Interestingly enough, 11 of those 18 have come since 1981. Perfect games used to be rare. What we have seen this year is unprecedented. It is unlikely that the perfect and near-perfect games will continue. It is possible that we won't see another one for 20-30 years. Way back in May of 2002, Mike Cameron and Shawn Green each hit four home runs in a game. In 2003, Carlos Delgado also accomplished thi...

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