Here's how he did it, according to The Action Network.
Berry says he placed the wager on St Louis during a business trip to Las Vegas in January — after spotting that the Blues had dropped to 250-1 long-shots to win the Stanley Cup after they crashed to the worst record in the NHL at the time.
He says he checked the team's odds at several Vegas casinos and sportsbooks before finding the odds at the Paris Las Vegas casino's odds were the best he could find.
His gut-feeling even prompted another close friend to follow his hunch — the individual placed a separate $200 bet on the same market for the Blues to win the league.
The man stood to win more than $50,000 on the outrageous bet.
Almost immediately after placing the bet, the Blues transformed.
The team won 30 of its final 49 games to sneak into the playoffs — and then blitzed everyone they came across on their way to meeting Boston in the seven-game Stanley Cup finals series.
At 250-1 with an investment of $400, Berry's ticket was worth $100,400 when the buzzer sounded on St Louis' fairytale Game 7 win.
Having already turned down a $75,000 cash-out offer ahead of Boston's series-tying victory in Game 6, Berry was the most relieved man in sport.
"Leading up to the game was the worst part," Berry said.
"I tried to keep my mind occupied, but nothing really worked. I remember there was like four hours to go and I tried to take a nap. Didn't happen."
He has rookie goaltender Jordan Binnington to thank after the St Louis star stopped 32 shots in Game 7, capping off a storybook season.
Captain Alex Pietrangelo and Conn Smythe Trophy winner Ryan O'Reilly each had a goal and an assist for St. Louis, who won after going 0-12 in their three previous trips to the Stanley Cup finals.
Binnington barred the door as the Bruins outshot the Blues but couldn't beat the Canadian rookie, who didn't become the team's starting goaltender until halfway through the season.
He is now a cult hero in the eyes on anybody who had a flutter on the Blues this season.
