Immaculate inning

In baseball, a strikeout occurs when a pitcher throws three strikes to a batter during his time at bat. Currently 80 different pitchers have struck out three batters on nine consecutive pitches in a half-inning of a Major League Baseball (MLB) game (for a total of 85 times), the most recent being Kenley Jansen of the Los Angeles Dodgers on May 18, 2017. Four players have accomplished the feat—commonly known as an immaculate inning—more than once in their career; Lefty Grove, Nolan Ryan, and Randy Johnson each did it twice, while Sandy Koufax accomplished the feat three times. No player has ever struck out four batters on twelve pitches in an inning. John Clarkson was the first player to strike out three batters on nine pitches, doing so in the third inning for the Boston Beaneaters against the Philadelphia Quakers on June 4, 1889.

Out of the 80 pitchers who have accomplished the feat, 63 were right-handed and 17 pitched left-handed. Thirteen of these players (including nine active pitchers) have played for only one major league team. Five pitchers—Roger Clemens, Bob Gibson, Randy Johnson, Pedro Martínez and Nolan Ryan—are also members of the 3,000 strikeout club.Sloppy Thurston, Wade Miley and Ryan are the only rookies to have attained the milestone. Ryan struck out three batters on nine pitches in the American League and National League, becoming the only player to achieve the feat in both leagues of MLB.Danny Jackson is the sole player to pitch an immaculate inning in the World Series.

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Wikipedia