In New York, home (in name, at least) to three N.F.L. teams and the league office, bets can only be placed in-person at four upstate casinos. New York City residents can more easily drive to the FanDuel sports book at the Meadowlands in East Rutherford, N.J., if they want to take the over on how many games the Giants will win this season (the line is set at six).

Or they can take a PATH train to Hoboken and bet on their phone from the platform, or pull over on the New Jersey side of the George Washington Bridge (please don’t actually do this).

The N.F.L.’s basic position is that it’s still early for legalized sports betting and the league doesn’t want to annoy the large portion of its audience that does not and will not bet. And with an enormous mass-market audience already, the N.F.L. contends it will benefit from legalization less than other sports. Consonant with that caution, the N.F.L. has far fewer betting-related deals than other American sports leagues.

Last month, the N.F.L. made its most consequential sports betting decision yet, expanding its partnership with Sportradar, a sports data company. Sportradar now has the exclusive right to sell official N.F.L. data to casinos and sports books worldwide. Carsten Koerl, the chief executive of Sportradar, called it “undoubtedly one of the most important partnerships in Sportradar’s history.”

Despite lobbying from sports leagues, only Tennessee and Illinois passed laws that mandate bookmakers buy and use official league data to determine certain wagers. But it can be harder to offer live, in-play wagers without it.