UFC 109: Relentless

UFC 109: Relentless was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on February 6, 2010 at the Mandalay Bay Events Center in Las Vegas, Nevada.

• Director: Anthony "Pasquale" Giordano
• Cast: Randy Couture, Mark Coleman, Chael Sonnen, Nate Marquardt, Paulo Thiago, Mike Swick, Demian Maia, Dan Miller