One bettor won more than a half-million dollars by hitting an insane parlay during Championship Sunday in the NFL. The lucky winner turned their $20 site credit on FanDuel into $579,000 by correctly guessing the winners and exact score of both conference championship games. There's 55 555. There's just 55 555.

The most widely-available online betting option in the United States, DraftKings Sportsbook app is a solid option for wagering on the Olympic Games. DraftKings boasts very competitive odds for the Games, including fun futures bets like medal winners and which country will win the most gold medals?