Kemba Walker took on some extra responsibility at the offensive end in Boston's first game since Gordon Hayward broke his left hand. Walker made a trio of key 3-pointers in the fourth quarter and finished with 29 points, Jaylen Brown added 25 points and 11 rebounds, and the Celtics beat the Dallas Mavericks 116-106 Monday night. read more https://www.espn.com/nba/recap?gameId=401160783