BOSTON — Daniel Cormier and Stipe Miocic showed why they are champions in the City of Champions on Saturday night at UFC 220. Cormier knocked out Volkan Oezdemir in the second round to defend the light heavyweight title and Stipe Miocic defeated Francis Ngannou via unanimous decision to defend the heavyweight title for a record third time in a wildly entertaining night of mixed-martial arts at TD Garden. In the heavyweight title fight, Ngannou and Miocic traded blows in an extremely scintillating first round. However, it appeared Ngannou tired out after trying to land a series of his trademark knockout blows during the first round. Miocic was succ... NESN.com