Wager on the excitement of the NBA postseason play-in games and claim up to $300 in bonus bets if you sign up today and claim this exclusive Fanatics Sportsbook promo . Starting Tuesday, Orlando, Atlanta, Chicago and Miami will all vie for the chance to face either Cleveland or Boston to open the Eastern Conference playoffs, while Oklahoma City and Houston await the winners of the Western Conference play-in games between Memphis, Golden State, Dallas and Sacramento.