PFL MMAUsman Nurmagomedov has become the biggest free agent in MMA, but Chael Sonnen doesn’t think the PFL champion would decimate elite UFC lightweights like some believe he could. Whether or not the change will sway Nurmagomedov to either staying or signing elsewhere remains to be seen. They can beat him too, but yes, Usman is that good.” Sonnen doesn’t believe it would be in PFL’s best interest to retain Nurmagomedov if the asking price is high, which many suspect that it is. Is Usman Nurmagomedov in for some tough fights if he joins the UFC roster?