Haddix will always be remembered for taking a perfect game into the 13th inning against the Milwaukee Braves on May 26, 1959. Haddix retired 36 consecutive batters in 12 innings, essentially relying on two pitches: fastball and slider. However, Braves pitcher Lew Burdette was also pitching a shutout, which was seriously jeopardized on only three occasions: the 3rd inning, when a base-running blunder negated three consecutive singles; the 9th, when Pittsburgh finally advanced a runner as far as third base; and the 10th, when pinch hitter Dick Stuart came within a few feet of ending Burdette's shutout bid with a two-run homer.
A fielding error by third baseman Don Hoak ended the perfect game in the bottom of the 13th, with the leadoff batter for Milwaukee, Félix Mantilla, reaching first base. Mantilla later advanced to second on a sacrifice bunt by Eddie Mathews, which was followed by an intentional walk to Hank Aaron. Joe Adcock then hit an apparent home run, ending the no-hitter and the game. However, in the confusion, Aaron left the basepaths and was passed by Adcock for the second out and the Braves won 2-0. Eventually the hit was changed from a home run to a double by a ruling from National League president Warren Giles; only Mantilla's run counted, for a score of 1-0, but the Pirates and Haddix still lost.
Haddix's 12 2/3-inning, one-hit complete game, against the team that had just represented the NL in the previous two World Series, is considered by many to be the best pitching performance in major league history.
This Rawlings official National League baseball was signed in purple by Haddix and includes a Great Moments COA.