The favorite is the team that is expected to win and is indicated by a minus sign (-) and the underdog is the team that is expected to lose and is indicated by a plus sign (+). To win the bet, all you need to do is select which team will win the game. Moneyline betting is a form of NFL betting that allows you to bet on the outcome of a game. When it comes to NFL Vegas Odds, you’ll find three popular options for each game: Moneyline, Spread, and over/under betting.