Austin Reaves, “AR15,” was heroic in making a last-second 3-pointer with .9 seconds remaining in overtime; giving the visiting Los Angeles Lakers, the victory over the Dallas Mavericks 107–104 on Wednesday. LeBron James scored 24 points leading the Lakers to win their third straight win; he was 9 of 19 from the floor, 4–9 three-pointers, and added three rebounds and five assists. Russell Westbrook scored 23 points, 10 rebounds, and nine assists; while Anthony Davis scored 20 points with 12 boards and two assists in returning after a two-game absence. Jalen Brunson led the Mavericks with 25 points. Kristaps Porzingis scored 23 points and had 12 rebounds, and Tim Hardaway Jr. added 20 points and nine rebounds. Dallas star guard Luka Doncic missed his third straight game with left ankle soreness. The Lakers took early control leading as much as 35–23 with 11:20 in the second quarter on Carmelo Anthony’s …