Jaylen Brown got an up-close view of Bronny James on Monday night ... and the Celtics star's first assessment of LeBron's son did not appear to be a glowing one.
The NBA Finals MVP had courtside seats for Bronny's Summer League matchup against Boston at the Thomas & Mack Center in Las Vegas ... and at one point during the contest, he leaned over and seemed to give his new girlfriend, WNBA player Kysre Gondrezick, a less-than-favorable review of the 19-year-old's game.
"I don't think Bronny is a pro," he said, according to online lip readers.