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.
Randy Couture
Self
Mark Coleman
Chael Sonnen
Nate Marquardt
Paulo Thiago
Mike Swick
Demian Maia
Dan Miller
Matt Serra
Frank Trigg
Mac Danzig
Justin Buchholz
