How will Cooper Flagg perform on Christmas? The 19-year-old will be the second youngest player to start on Christmas day in NBA history. 0:56 Now Playing Paused Ad Playing Cooper Flagg flying up All-Star voting 0:52 Now Playing Paused Ad Playing KOC on Dallas having a new emerging star 0:51 Now Playing Paused Ad Playing The Dunker Spot on Cooper Flagg’s improvement so early into his rookie campaign 0:45 Now Playing Paused Ad Playing Cooper Flagg with 35 points vs. LA Clippers 0:57 Now Playing Paused Ad Playing Mavs to be cautious with Flagg after ankle injury 1:32 Now Playing Paused Ad Playing Cooper Flagg with 33 points vs. Denver Nuggets 0:59 Now Playing Paused Ad Playing 5 NBA rookies besides Cooper Flagg you should be collecting 0:47 Now Playing Paused Ad Playing Cooper Flagg slams it home 0:19 Now Playing Paused Ad Playing Will Cooper Flagg vs. Kon Knueppel become the next great NBA rivalry? 3:14 Now Playing Paused Ad Playing The Dunker Spot on Cooper Flagg's start to his rookie season 0:48 Now Playing Paused Ad Playing How will Cooper Flagg perform on Christmas? Yahoo Sports Wed, Dec 24, 2025 The 19-year-old will be the second youngest player to start on Christmas day in NBA history. How will Cooper Flagg perform on Christmas? The 19-year-old will be the second youngest player to start on Christmas day in NBA history. 0:56 Now Playing Paused Ad Playing Cooper Flagg flying up All-Star voting 0:52 Now Playing Paused Ad Playing KOC on Dallas having a new emerging star 0:51 Now Playing Paused Ad Playing The Dunker Spot on Cooper Flagg’s improvement so early into his rookie campaign 0:45 Now Playing Paused Ad Playing Cooper Flagg with 35 points vs. LA Clippers 0:57 Now Playing Paused Ad Playing Mavs to be cautious with Flagg after ankle injury 1:32 Now Playing Paused Ad Playing Cooper Flagg with 33 points vs. Denver Nuggets 0:59 Now Playing Paused Ad Playing 5 NBA rookies besides Cooper Flagg you should be collecting 0:47 Now Playing Paused Ad Playing Cooper Flagg slams it home 0:19 Now Playing Paused Ad Playing Will Cooper Flagg vs. Kon Knueppel become the next great NBA rivalry? 3:14 Now Playing Paused Ad Playing The Dunker Spot on Cooper Flagg's start to his rookie season 0:48 Now Playing Paused Ad Playing