This pitching feat has happened only 17 times in MLB history; Randy Johnson had the last one, in 2004
The perfect game was the 17th in baseball history, the predecessor 
being... [DOC] [TLE] List of Major League Baseball perfect games - Wikipedia [PAR] Over the 140 years of Major League Baseball history, and over 210,000 games 
played, there have been 23 official perfect games by current definition.