For months the NFL has been threatening to sue Delaware if the state went ahead with plans for sports betting this fall.

Other leagues have joined Roger Goodell and the NFL in the battle with Delaware.

Friday, the league, which had been pro sports' biggest opponent to Delaware's plans, followed through. And it convinced some powerful friends to join in the fight. In federal court in Wilmington, the NFL, NBA, Major League Baseball, the NHL and the NCAA filed a complaint to stop Gov. Jack Markell and the Delaware State Lottery Office from taking bets on their games.

Delaware, along with Nevada, Montana and Oregon, is one of four states legally exempt from the 1992 Professional and Amateur Sports Protection Act (PASPA),