UFC News & FeaturesSean explores some factors that could have led to what some are calling the biggest upset in MMA history, as Julianna Pena defeated Amanda Nunes by submission in Round 3 to capture the Bantamweight championship at UFC 269 whilst being a 12-to-1 underdog. Sean gives his thoughts on Pena's upset of Nunes in this episode of "The Sheehan Show."
