Over the 154 years of Major League Baseball history, and over 238,500 games played,[1] there have been 24 official perfect games by the current definition.[2] No pitcher has thrown more than one. The perfect game thrown by Don Larsen in Game 5 of the 1956 World Series is the only postseason perfect game in major league history and one of only three postseason no-hitters. The first two major league perfect games, and the only two of the premodern era, were thrown in 1880, five days apart. The frequency of perfect games has increased significantly since 1981. Fifteen perfect games were thrown in the 44 seasons from 1980 through 2023, while only nine were thrown in the 100-plus prior seasons. There were three perfect games in 2012; the only other year of the modern era in which as many as two were thrown was 2010. By contrast, there have been spans of 23 and 33 consecutive seasons in which no perfect game was thrown. Though two perfect-game bids have gone into extra innings, no extra-inning game has been completed to perfection.