UFC heavyweight champion Stipe Miocic (17-2) has not been an underdog many times in his MMA career. However, this Saturday at UFC 220 in Boston, Miocic will enter the Octagon as a dog despite being the defending champ against a challenger in Francis Ngannou (11-1) taking a big step up in competition in hopes of winning the title belt.

Odds courtesy of OddsShark.com

Miocic is listed at +145 (bet $100 to win $145) with Ngannou the -175 favorite (bet $175 to win $100) in the main event for the undisputed heavyweight championship.

Ngannou’s rise to this title fight has been remarkable, earning a shot at Miocic’s belt by flooring Alistair Overeem with the Knockout of the Year at UFC 218 just seven weeks ago. He is unbeaten in the UFC at 6-0, with five of his opponents getting knocked out and one submitted. His past four fights have all ended in the first round.