After Belfort was unable to secure the submission via armbar, Jones went on the attack, picking "The Phenom" apart before finishing him with a submission of his own in the fourth.
"He got that armbar (locked in tight)," Jones said. "I've never had my arm pop like that before, but I've worked too hard to give up."
Jones (17-1), who earned his fourth successful title defense, said the arm went numb, but "my brain was screaming to throw it. It didn't feel powerful, just a real numb feeling."
Through the second and third rounds, "Bones" took advantage of his 12-plus-inch reach advantage. Along with holding the striking edge, Jones was continually kicking the lead leg of Belfort, taking away any power Belfort had in his hands.
Jones set a new light heavyweight division record with his sixth submission victory. Belfort (21-10) was the fifth former UFC champion in a row he has faced, and he moved within one more title defense of tying the record set by Tito Ortiz.
Belfort said a training injury to his rib was re-opened with a Jones kick, adding, "he was long, moved pretty well and holds himself pretty well; that's why he's the champion."
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