Rookie of the Month. Cooper Flagg earns Western Conference Rookie of the Month honors for December 🏆 23.5 PPG | 6.2 RPG | 4.8 APG The future is already here. @nba @thenbpa @cooper_flagg @dallasmavs @newbalancebasketball #nba #dallas #dallasmavericks #cooperflagg #rookieofthemonth