Rajon Rondo didn't have to wait for the NBA season to pursue another ring ... 'cause the 2-time champ just popped the big question to his girlfriend -- and she said "yes!!!"
The 4-time All-Star got down on one knee and asked for his partner Latoia Fitzgerald's hand in marriage Thursday night ... and it was one of the biggest nights of her life in more than one way, as she was also hosting a huge NYFW event for her clothing brand, "Lionne."
Right as the show ended, Rondo hopped up on the runway as Latoia's back was turned .