NFL officials are discussing the possibility of playing future games in London's Olympic Stadium.
Wembley Stadium, where the league has held games in the past, has a five-year deal with the NFL through 2017. Olympic Stadium, which hosted the opening and closing ceremonies and track and field compeititon in the 2012 Games, is set to reopen in 2014.
London mayor Boris Johnson, who is chairman of the London Legacy Development Corporation that operates the stadium, began preliminary talks with the NFL last weekend when the New England Patriots played in London and defeated the St. Louis Rams.
It was the sixth consecutive year a regular-season game has been played in Wembley. Two games are scheduled there next season.
"Given the ever-growing popularity of gridiron this side of the Atlantic, the mayor and his team have held a number of meetings with senior executives in the last few days to explore further opportunities for NFL in London," a spokesman for the mayor said, according to Telegraph Sport. "The talks were exploratory. We are at an early stage, but the signs are encouraging."