Just when you thought Sterling Brown's night couldn't get any worse ... we've now learned the NBA player was on a 1st date with a woman when he was tased in a Walgreens parking lot.
TMZ Sports obtained filed and video from the internal investigation into the Jan. 26th incident -- which made national news for the way Milwaukee PD officers aggressively handled the Bucks player, whose only mistake was parking in a handicap space.
Cops took Brown down to the ground and tased him -- despite the fact video evidence showed he never resisted or seemed to pose a threat.