Miocic, Cormier defend heaviest titles at UFC 220

Stipe Miocic, top, presses his elbow into the throat of Francis Ngannou during a heavyweight championship bout at UFC 220. (AP Photo/Gregory Payan)

BOSTON — Stipe Miocic set the UFC heavyweight record with his third straight successful title defense, turning the anticipated slugfest against Francis Ngannou into a methodical ground-and-pound bout to win the main event of UFC 220 at TD Garden.