Robert Bortuzzo and Vladimir Tarasenko also scored in St. Louis’ first Cup finals victory after losing the previous 13.
Sean Kuraly scored to break a third-period tie and assisted on another goal to help the Boston Bruins rally from a two-goal deficit and beat the St. Louis Blues 4-2 on Monday night in Game 1 of the Stanley Cup Final.
William Hill, South Point, MGM Resorts and Caesars Entertainment each face mid-six figure liabilities on St. Louis, which was a 300-1 long shot in January to win the Cup.
Stone assisted on a last-second, game-tying goal in regulation, then scored in overtime to help Canada beat Switzerland 3-2 in the quarterfinals.
Former Golden Knights forward David Perron had a goal and an assist for St. Louis.