Tuesday night marks the start of the NBA regular season as the Denver Nuggets begin their title defense. Milwaukee Bucks and Boston Celtics are currently the betting favorites to win the NBA championship. The Phoenix Suns are a close fourth on DraftKings' futures board, while the Denver Nuggets are third in the odds to win it all. In the previous four seasons, neither of the teams that made it to the NBA Finals the year before made it back to the championship game.