Baseball retroactively decided it was no longer a no-hitter.
I guess because eventually the Braves did get a hit and won the game. I think it was classified as a perfect game for many years because he was perfect for the first nine innings.
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Yes...... yes.............. making baseball nearly as ignorant then as the NFL is behaving today.
The most common reason for eliminating no-hitters was that many of them were less than nine-inning games. Pitchers that tossed seven no-hit innings in a game that was called early due to rain used to be given credit for a no-hitter.
Perhaps the oddest "scrubbed no-hitter" I can remember involved the hapless New York Yankees pitcher Andy Hawkins, who threw eight innings of no-hit ball in 1990 but lost the game -- by FOUR RUNS. He gave up just three walks through the first seven innings, but in the eight inning the Yankees gave up four runs on two walks, a stolen base, and three errors.
He lost the no-hitter because he never pitched the ninth inning. The Yankees were the visiting team, and with a 4-0 lead the opposing team didn't have to bat in the bottom half of the ninth.