Legend is the story of Fergy leaving a restaurant in Toronto -- his steak still on the grill -- when Shack walked in. And those of skipping golf tournaments or hockey schools that included players other than Canadiens.
The 1960s rivalry between the Original Six Canadiens and the Maple Leafs, who played each other 14 times per season, was off the charts.
"We'd come into Toronto by train from Detroit, and [Canadiens coach] Toe Blake had forgotten to pack his socks," Fergy said. "So Toe sent [trainer] Larry Aubut out to buy some, and Larry came back with a pair that had a maple leaf on 'em. Toe cursed and threw 'em out, sayin' he couldn't wear maple-leaf socks, and he shoved his bare feet into his shoes. In the dead of winter."
Fergy's intensity could consume him both on and off the ice, his blood boiling when that of others merely simmered.
But he had his light moments, too, especially enjoying his notoriety in Toronto.
"I'd skate past the Toronto bench and yell, 'C'mon, Punch [coach Imlach], send your next [fighter] out. Gimme the best you got,' " Fergy said.
"I'd go into the Toronto Stock Exchange and look down at the traders on the floor and get 'em going. They'd see me, a Canadien, giving it to 'em from upstairs and they'd get really worked up, booing and hooting at me. Every time we played there, I'd go to the stock exchange and get the boys going. You know ... just for fun."
In 2003, Fergy, then a scout for the San Jose Sharks, did the unthinkable and pulled on the jersey of Maple Leafs legend Bobby Baun during a celebrity fishing junket on the coast of British Columbia, this heinous wardrobe malfunction celebrating news that Fergy's son, John Jr., had just been named general manager of the Maple Leafs.