Conor McGregor's First Event as a Headliner in USA | UFC Boston, 2015 | On This Day HD

On this day in 2015, Conor McGregor made his headliner debut stateside in Boston against Dennis Siver. After this performance, McGregor would compete for the interim featherweight title and continue his rapid rise to superstardom. Subscribe to get all the latest UFC content: http://bit.ly/2uJRzRR Experience UFC live with UFC FIGHT PASS, the digital subscription service of the UFC. Visit https://ufcfightpass.com/ To order UFC Pay-Per-Views on ESPN+, visit https://bit.ly/2vNIBE8 (U.S. only) To order UFC Pay-Per-Views, visit http://welcome.ufcfightpass.com/#PPV (Non U.S.) Shop official UFC gear, visit https://ufcstore.com/ Connect with UFC online and on Social: Website: http://www.ufc.com Twitter: http://www.twitter.com/ufc Facebook: http://www.facebook.com/ufc Instagram: http://www.instagram.com/ufc Snapchat: UFC Twitch: https://www.twitch.tv/ufc Connect with UFC FIGHT PASS on Social: Twitter: http://www.twitter.com/ufcfightpass Facebook: http://www.facebook.com/ufcfightpass Instagram: http://www.instagram.com/ufcfightpass #UFC