Trae Young is going to bat for his NBA buddy Devin Booker ... saying the dude had every right to throw a tantrum in a pickup game Monday -- adding it's insane people were double-teaming him!!
"DBook speaking facts," Trae said of the Phoenix Suns superstar Wednesday ... "There should be NO Double Teaming in pick up."
Of course, Booker went off on some guys in an open run sesh earlier this week when he was doubled on the baseline while trying to attack the basket.
“Hey bro we not doubling in open gym.