Video: UFC Vegas 15/Mike Tyson vs. Roy Jones Jr. preview show

Photo by Chris Unger/Zuffa LLC With UFC Vegas 15 just hours away, MMA Fighting’s Mike Heck, Jose Youngs and E. Casey Leydon break down the top storylines ahead of Saturday’s event at the UFC APEX, including the brand new main event between Anthony Smith and Devin Clark, along with the highly anticipated boxing event headlined by Mike Tyson vs. Roy Jones Jr.