The Game -- You're Not NBA Material ... Says Baron Davis

Baron Davis has a message for all the celebs who think they have NBA-level hoop skills -- you don't.

Davis is definitely a guy who would know ... the ex-NBA star just produced and directed a documentary called, "The Drew" ... about the legendary Drew League in L.A., where pros and celebs have been hooping together for years.

The Drew League has featured some HUGE stars -- including ballers like Kobe, LeBron and Durant playing with superstars like The Game and Chris Brown.

So, which celebs have enough talent to make their NBA hoop dreams come true?

"None of em" ... Baron says.

Baron didn't stop there, 'cause when we asked about Game -- who made some highlight reel dunks at the Drew last year -- Davis continued to keep it super duper real.

"Game can dunk ... but he ain't got no dunk skills."