UFC superstar Jon Jones says his NFL star brother Chandler Jones is doing well after a bizarre police incident last week ... saying he's just going through the "growing pains" of being a celebrity.
Chandler -- a star defensive end for the New England Patriots -- was hospitalized after dropping to his knees outside the Foxborough PD station in a discombobulated state. He was not arrested.
However, big bro Jon says Chandler has been doing really well since the incident -- telling us, "[He's] a young guy who's had a lot thrown at him" ... including a "new level of fame and success."
Jon says Chandler is now "doing what he has to do to make things right."
"Chandler's in a good position man. I'm so happy for him."
Chandler and the Patriots take on the Broncos on Sunday -- and Jon says he can't wait to cheer on his bro.