Cornellius RJ Aritonang, "R.J.", is an active Indonesian professional MMA fighter from Indonesia in the Featherweight division. He holds a professional record of 4-1, known for finishing opponents (1 by KO/TKO, 2 by submission). He is currently ranked #3616 Men's Pound for Pound and #634 Featherweight by FightTruth's model. He has gone 4-1 over 5 recent fights.