How many perfect games have been pitched in Major League Baseball?

Answer:

20 Official Perfect Games; 18 in the Modern Era, 2 in the 19th Century

19th Century

Lee Richmond (WOR)
June 12, 1880

John Montgomery Ward (PROV)
June 17, 1880


Modern Era

Cy Young (BOS)
37 RHP, 8 K, May 5, 1904

Addie Joss (CLE)
74 pitches, 3 K, October 2, 1908

Charlie Robertson (CHW)
90 pitches, 6 K, April 30, 1922

Don Larson (NYY)
97 pitches, 7 K, October 8, 1956
(Game 5 of the World Series)

Jim Bunning (PHI)
90 pitches, 10 K, June 21, 1964

Sandy Koufax (LAD)
113 pitches, 14 K, September 9, 1965

Catfish Hunter (OAK)
107 pitches, 11 K, May 8, 1968

Len Barker (CLE)
103 pitches, 11 K, May 15, 1981

Mike Witt (CAL)
94 pitches, 10 K, September 30, 1984

Tom Browning (CIN)
102 pitches, 7K, September 16, 1988

Dennis Martinez (MON)
95 pitches, 5 K, July 28, 1991

Kenny Rogers (TEX)
98 pitches, 8 K, July 28, 1994

David Wells (NYY)
120 pitches, 11 K, May 17, 1998

David Cone (NYY)
88 pitches, 10 K, July 18, 1999

Randy Johnson (ARI)
117 pitches, 13 K, May 18, 2004

Mark Buehrele (CHW)
116 pitches, 6 K, July 23, 2009

Dallas Braden (OAK)
109 pitches, 6 K, May 9, 2010

Roy Halladay (PHI)
115 pitches, 11 K, May 29, 2010


Unofficial Perfect Game

Armando Galarraga (DET)
Bad call, June 2, 2010
under review; unlikely to be reversed

This answer is closed to changes. This is done in rare cases when questions are being vandalized or answers have become debates. E-mail reopen @ answers.com (no spaces) if you would like it to be reopened.