NBA referees just called out Dak Prescott -- pressuring the league to take action against the Cowboys QB after he praised fans who threw objects at officials after the playoffs game with the 49ers.

If you missed it ... Cowboys fans were pissed over the controversial ending to the wildcard game (Dallas lost 23-17) on Sunday ... which abruptly ended their season.

Of course, Dallas fans blame the refs for the L -- since the ump wasn't able to spot the ball with enough time for Dak to get a snap off and clock the ball ... leaving time for one last play in the end zone.

After the game, reporters asked the Dallas Cowboys QB about fans throwing stuff ... and he simply replied, "Credit to them. Yeah, credit to them."