To achieve a perfect game, a team must not allow any opposing player to reach base by any means: no hits, walks, hit batsmen, uncaught third strikes, catcher's or fielder's interference, or fielding errors which allow a batter to reach base.
At the beginning of every major-league game, an average pitcher facing a lineup of average hitters has a .000983 percent chance of pitching a perfect game.
There have been only 24 perfect games in the history of Major League Baseball. Below, you will find the 4 perfect games tossed by a Yankee pitcher.
Germán pitched MLB's 24th perfect game on June 28, 2023. Germán's performance marked the fourth perfect game by a Yankees pitcher, the most by a single team in major league history. Germán pitched it against the lowly Oakland A's.
On July 18, 1999, David Cone of the New York Yankees pitched the 16th perfect game in Major League Baseball (MLB) history and the third in team history. Cone pitched it against the Montreal Expos at Yankee Stadium in The Bronx, with 41,930 fans in attendance. The game took 2 hours and 16 minutes.
On May 17, 1998, David Wells of the New York Yankees pitched the 15th perfect game in Major League Baseball history and the second in team history. Pitching against the Minnesota Twins at Yankee Stadium in The Bronx in front of 49,820 fans in attendance, Wells retired all 27 batters he faced. The game took 2 hours and 40 minutes to complete.
On October 8, 1956, in Game 5 of the 1956 World Series, pitcher Don Larsen of the New York Yankees threw a perfect game against the Brooklyn Dodgers at Yankee Stadium. Larsen needed just 97 pitches to complete the game, and only one Dodger batter (Pee Wee Reese in the first inning) was able to get a three-ball count.