Jon Barry -- The NBA Doesn't Have Enough White Guys ... to Top My Bro Brent Barry's Dunk

Ex-NBA star Brent Barry threw down the greatest dunk by a white man in NBA history -- according to our camera guy -- and Brent's brother says it may never happen again ... due to the Association's severe lack of white dudes.

Current NBA analyst and former player Jon Barry held a State of the Union for NBA white guys yesterday at LAX ... when our photog brought up Brent's 1996 Dunk Contest winning slam.

So, can any pigment-challenged baller today top Brent? Jon says, "I don't know about that ... there's only about 35 white guys in the league."

He may or may not have been kidding.

Fun Fact: The actual number of white NBA players is somewhere between 60-75, depending on fluctuating team rosters

But for reals ... Brent's foul-line slam was awesome.