Jonathan Dwight "Jon" Jones (born July 19, 1987) is an American mixed martial artist signed with the Ultimate Fighting Championship, where he is the UFC Light Heavyweight Champion.

Mixed martial arts (MMA) is a full contact combat sport that allows the use of both striking and grappling techniques, both standing and on the ground, including boxing, wrestling, Brazilian jiu-jitsu, muay Thai, kickboxing, taekwondo, karate, judo and other styles.