The game was developed by Brian Minter, a software developer from Atlanta, who named it after the
immaculate inning, in which a pitcher strikes out three batters on three pitches each. The first grid appeared on April 4, 2023. Originally, the grids were automated, but Minter eventually began to select the categories himself in order to avoid repetition. As of May 2023, the game was primarily played by Minter and his friends, but it began to gain a larger audience when one of them posted it to
Reddit, and became even more popular after it was shared by the
Twitter account @FoolishBB on June 13. the (men's) basketball version followed on July 25, and an
ice hockey version was launched one day later. A soccer version, called Immaculate Footy, was rolled out on August 18, 2023. A version for women's basketball exists as well. ==Reception==