Cooper Flagg called his NBA Summer League debut “one of the worst games of my life” after shooting 5-of-21 from the field.

The No. 1 pick in last month’s draft scores 10 points in 32 minutes and blocks a shot that leads to the game-winning 3-pointer as Dallas edges the Lakers, 87-85. Cole Swider has 22 points and 10

Cooper Flagg had a forgettable Summer League debut with the Mavericks on Thursday night but still made key plays down the stretch in a 87-85 win over Bronny James and the Los Angeles Lakers.