Boris Gorentc announced about finishing his career due to knee injuries. That's how high-flyers and dunkers usually end their careers.
You probably haven't even heard about him. Few people know that he was even signed by Chicago Bulls in 1997 and he had a chance to practice with Michael Jordan (Unfortunately, he was waived a month after being signed thus having not played a single official NBA game).
He was known for his solid skills and excellent leaping ability for a white basketball player. He participated in a Slovenian slamdunk contest versus Marco Milic in 1995. I suggest to watch this video: