The April 1985 issue of Sports Illustrated
revealed that the New York Mets had recruited a rookie pitcher named Sidd Finch who could throw a baseball at 168 mph — 65 mph faster than the previous record. Surprisingly, Sidd Finch had never played baseball before, but he had mastered the "art of the pitch" in a Tibetan monastery. Mets fans couldn't believe their good luck and, accepting at face value the peculiarities of Sidd Finch's past, flooded Sports Illustrated
with requests for more information. But in reality this amazing player only existed in the imagination of author George Plimpton, who had left a clue in the sub-heading of the article: "He's a pitcher, part yogi and part recluse. Impressively liberated from our opulent life-style, Sidd's deciding about yoga —and his future in baseball." The first letter of each of these words, taken together, spelled "H-a-p-p-y A-p-r-i-l F-o-o-l-s D-a-y A-h F-i-b". More...
The Top 100 April Fool's Day Hoaxes of All Time
Other April Fool resources at the Museum include: the April Fool Archive (a year-by-year archive of the entire history of the celebration), the Origin of April Fool's Day, the April Fool FAQ, and the Top 10 Worst April Fools Ever. Also, you can find more info about most of the hoaxes in the Top 100 list by clicking their title or thumbnail.