Kemba Walker scored 20 points to end a career-long personal losing streak against LeBron James, and Jayson Tatum scored 27 to lead the Boston Celtics past the Los Angeles Lakers 139-107 on Monday night and send the top team in the Western Conference to its biggest loss of the season. Jaylen Brown scored 20 points and Enes Kanter had 18 points and 11 rebounds for Boston, which snapped a three-game losing streak. The Celtics gave up the first eight points of the game but turned things around when Anthony Davis, playing for the first time in almost two weeks, went to the bench with a pair of fouls 49 seconds apart early in the first quarter.