Rating recent perfect games by luck

Perfection. What does that really mean? No one is perfect. But for one game, perfection cam be achieved. It happens on a night when you have the best stuff of your life and pinpoint control. But in addition to that, unless he strikes everybody out, a pitcher needs his defense to be making all the plays behind him. So to some extent, luck is a factor. Since you can’t really be perfect, you need luck on your side to appear perfect, even for one night. With that in mind, let’s look at recent perfect games (as far back as Baseball-Reference has batted ball data- 1988) and see to what extend these pitchers were perfect and to what extent luck and great defense were the driving forces that made the perfect game happen. Browning's crowning moment came in his best season as he went 18-8, 3.41 in '88. (si.com) Tom Browning (9/16/88): Tom Browning of the Cincinnati tossed the 12th perfect game in Major League Baseball history in September of 1988, beating Tim Belcher and...