John Salley Slams NBA For Draymond Green Suspension, 'They Overreacted'

John Salley vehemently disagrees with the NBA's decision to hit Draymond Green with an indefinite ban this month ... telling TMZ Sports the suspension was a complete overreaction.

The four-time NBA champion said this week he's in favor of sidelining Green for smacking Jusuf Nurkic during the Warriors vs. Suns game on Dec. 12 ... but he thinks the indefinite part of the punishment is simply taking things too far.

"You can have a conversation, give him a certain amount of games for him to simmer down and have intelligent conversations with him," Salley said of Green. "But to get rid of him indefinitely, I think that is a bigger thing."

Salley told us he loves Draymond's playing style -- which makes sense ... considering the 6-foot-11 former center was a part of the '80s/'90s "Bad Boys" Pistons squads -- and he clearly believes Green hasn't done much wrong to warrant the latest suspension.

"I would take Draymond Green every day and twice on Sunday," he said.

In fact, Salley told us the guy would've been a perfect fit on his old Detroit teams.

"I hope Draymond comes back and I love his play," Salley said. "And I know he wears a Bad Boy T-shirt under his uniform."