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Khabib Nurmagomedov (29-0-0) unified the lightweight championship Saturday afternoon with a win over interim champion Justin Gaethje (22-3-0) but even more shocking was the announcement of his retirement from MMA. https://www.youtube.com/watch?v=05HuTGeF5AA Gaethje, who shocked Tony Ferguson previously to earn the title shot, came out extremely cautious, using footwork and carefully…
