As unusual as this number may seem, the bid for the perfect game on May 26, 1959 was lost when the Braves 37th batter, Felix Mantilla, led off the 13th inning by reaching first on an error by Pirate's 3rd baseman Don Hoak.
↑This may seem impossible. However, by definition a perfect game requires more than simply retiring the first 27 batters in order; it also requires that the pitcher's team's wins, and that the pitcher complete the entire game. See perfect game for more details.
↑These four events may be the only times in the history of baseball when a team has deliberately and with premeditation allowed a run to score by the opposing team for strategic purposes. It is true that there are cases where a particular choice of defensive alignment may make scoring more likely, and there are cases where decisions made in the moment of play allow a run to score in exchange for other strategic purposes, but intentionally walking in a run is clearly in a different class of strategic maneuver. This may also have occurred if a pitcher was instructed to deliberately hit a batter with the bases loaded, but in this case, intention is not provable.
↑The Baseball Almanac reports the most consecutive strikeouts as 8 in the American League, achieved by 5 pitchers, and as 10 in the National League. This does not exclude the possibility other National League pitchers achieved 8 or 9 strikeouts.
↑ 8.08.1This may seem impossible. However, a strikeout can be recorded on a batter who reaches first base safely under a dropped third strike. If strike three is recorded on the batter but the catcher does not catch the ball to complete the putout (likely due to a wild pitch or passed ball, and first base is unoccupied, the batter may advance to first. The pitcher is credited with a strikeout, but no out is recorded.
↑The Baseball Almanac states that 16 pitchers have accomplished this feat. Of these, all but Chuck Finley have only once struck out 4 batters in a single inning (consecutively or otherwise). Finley however did it 3 times, but the Baseball Almanac does not state how many of those were consecutive strikeouts (ie, whether it was once, twice, or all 3 times).
↑Some sources do not include the two perfect games thrown in the 19th century, due to differences in the rules of play, and thus list only fifteen perfect games.