NBA veteran Allen Crabbe -- who was just traded to the ATL Hawks -- was arrested for DUI on the Sunset Strip late Tuesday night ... and TMZ Sports has the video.
We're told cops noticed the 27-year-old was "straddling lanes" around 11:30 PM -- so they pulled him over ... and during the stop, the officer suspected he was drunk.
The 6'6", 210 pounder was asked to step out of the car to perform a field sobriety test -- and while he didn't completely bomb it (based on the video we shot) .