Dirk Nowitzki scored the 20 points he needed for 30,000 in his career in barely more than a quarter, and the Dallas Mavericks celebrated with their second straight easy home win over the Los Angeles Lakers, a 122-111 victory Tuesday night.The 7-foot German became the sixth NBA player and the first international one to reach the milestone, joining four Hall of Famers and a future one in Kobe Bryant. Nowitzki is one of three to score all 30,000-plus with one team. The others are Karl Malone (Utah) and Bryant (Lakers). The 38-year-old Nowitzki matched the best first quarter in his 19 seasons by scoring 18 points, and reached the hallowed mark on a 15-foot fadeaway jumper from the baseline over Larry Nance Jr. with 10:58 remaining in the second quarter.Nowitzki scored all of his 25 points - one shy of his season high - in the first half to send the Mavericks to a 31-point lead in the third quarter. This was the Lakers' first visit to Dallas since setting a franchise record with a 49-point loss, a 122-73 blowout on Jan. 22. Dallas extended a franchise record with its 14th straight win over the Lakers, who got a triple-double from Julius Randle with 13 points, 18 rebounds and 10 assists in their eighth straight loss.