Brandon Clarke Death

The NBA is devastated by Brandon Clarke's death ... with the Memphis Grizzlies player's teammates over the years sharing heartfelt tributes on social media.

Kyle Anderson, who had two stints with the Grizzlies, said he was "so f***in hurt" by the loss ... adding, "I love u so much brother i wish i coulda been there for u im so f***in hurt man."

Jaylen Wells also shared an Instagram Story ... stating, "Everything he's went through in the time I've been in Memphis he still came in with a smile on his face and was a light in the locker room, truly an inspiring person."

Brandon Clarke's death is being investigated as a possible overdose ... with officials finding drug paraphernalia inside the home the Memphis Grizzlies player was staying at on Monday.

The Los Angeles Fire Department responded to a medical emergency call around 5 PM on Monday ... and when paramedics got to the scene, Clarke was declared deceased, according to NBC4.

An autopsy will determine the cause and manner of death.

Brandon Clarke was seemingly happy and healthy in the days leading up to his tragic death at just 29 years old, his barber tells TMZ Sports.

Clarke, who passed away Monday night in the Los Angeles area, had been staying in the city with one of his friends from college ... and Brandon seemed to be enjoying the offseason.

In fact, we talked to the guy who cut Brandon's hair on Friday, and he says the hooper seemed perfectly content during the appointment.

The barber says the guys even watched the NBA Playoffs during the haircut, tuning in to the Spurs vs. Timberwolves game.

TMZ Sports broke the story on Tuesday ... Clarke passed away early Monday evening, leaving the sports world stunned.

Everyone from Brandon's teammates to the Grizzlies, and even the NBA expressed condolences over the horrible news.

“We are devastated to learn of the passing of Brandon Clarke. As one of the longest-tenured members of the Grizzlies, Brandon was a beloved teammate and leader who played the game with enormous passion and grit," commish Adam Silver said.

"Our thoughts and sympathies are with Brandon’s family, friends and the Grizzlies organization.”