Weekly Pulse: The biggest name in UFC will return to the Octagon for a lightweight showdown. Conor McGregor first fought Dustin Poirier in September 2014, with McGregor getting a first round TKO victory. MMA Junkie is here to break down their predictions for this rematch. » Subscribe to USA TODAY Sports: https://bit.ly/2L0ktE1 » USA TODAY delivers current local and national news, sports, entertainment,  finance, technology, and more through award-winning journalism, photos, videos and VR. #ConorMcGregor #UFC257 #MMA