DALLAS (AP) Luka Doncic scored 28 of his career-high 51 points in the first quarter, and the Dallas Mavericks beat the Los Angeles Clippers 112-105 on Thursday night. The 22-year-old star’s 3-point frenzy, part of the highest-scoring quarter in the NBA this season, came a few hours after the Mavericks traded Kristaps Porzingis to Washington. Despite Doncic hitting seven of his first nine 3s in the highest-scoring quarter of his career, regular season or playoffs, the Clippers were as close as two points in the fourth quarter.