"The 1942 Detroit Red Wings became the first team in sports history to lose a series after taking a 3-0 advantage, losing four straight to the Toronto Maple Leafs in the Stanley Cup finals."
This from a list of all time chokes, although it made honorable mention rather than top ten. Several el foldo's in golf and tennis, even bicycle racing, were sprinkled amongst the top ten. I think we can pretty much disregard those.
Oh to have been alive and a hockey fan in '42...woulda been sweet