Jaylen Brown's hair -- or perhaps lack thereof -- is the talk of the NBA right now ... and even the Boston Celtics broadcast team got in on the jokes with a mid-game jab on Wednesday.
Brown bald balled out against the Cavs with a 30-point performance ... and after one highlight in the second quarter, play-by-play guy Drew Carter made reference to the speculation he got caught painting his hairline.
"Brown, the spin and the deuce .