The Mavericks closed out the exhibition season with a 111-96 loss at Charlotte, but considered it a good night on two fronts. Foremost, rookie point guard Dennis Smith Jr., who suffered a sprained ankle the previous night in Atlanta, returned with 10 points and nine assists.Secondly, forward Harrison Barnes had a game-best 24 points, showing he's in regular season form despite shooting 8 for 19 from the field.