Best known for playing Williams in the classic Bruce Lee film “Enter the Dragon,” Kelly appeared in other 1970s action films, including “Black Belt Jones” and “One Down, Two to Go."
Kelly once told Salon.com that working with Bruce Lee was “the best experience of my life. I learned so much from working with him. I probably enjoyed working with Bruce more than anyone else I’d ever worked with in movies because we were both martial artists. And he was a great, great martial artist.”
Kelly's performances created opportunities for other martial arts actors of color. He told the Los Angeles Times in 2010, “I broke down the color barrier – I was the first black martial artist to become a movie star. It’s amazing to see how many people still remember that, because I haven’t really done much, in terms of movies, in a long time.”
Kelly later went on to play tennis, competing in the USTA senior circuit. He recently appeared at various autograph and comic book conventions, where he was a favorite among fans.