Wrong calls are bad enough. But they’re even worse when there’s no ref to blame. Argentine Roberto De Vicenzo’s final-round score of 65 at the 1968 Masters Golf Tournament should have led him to a playoff for the championship. But when he traded the club for the pen, he lost his chance. His playing partner had recorded the wrong score for one hole — marking a par instead of a birdie — and De Vicenzo signed the scorecard, meaning that number (off by one stroke) counted. “What a stupid I am to be wrong here,” he said. And it was his birthday too.
Top 10 Blown Calls
It was the perfect game that wasn't. Umpire Jim Joyce mistakenly ruined Armando Galarraga's perfect game with a bad call. TIME takes a look at other refs who changed the course of sports history with bad calls