New McGregor fans are banned from this discussion. Jon Jones is basically 24-0 and spent his entire career in the UFC. He made his UFC debut 7 months into his professional career and beat the previously undefeated, BJJ blackbelt and undefeated Andre Gusmao in beautifully sloppy fashion in his UFC debut. Never lost. Youngest UFC champ in history. Beat 4/5 champs that preceded him. Crushed the Bellator LHW champ. Beat Cormier's ass twice. The guy is legitimately a goddamn legend. Kiss the ring.