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.
Rated R | Length 163 minutes
Randy Couture | Mark Coleman | Chael Sonnen | Nate Marquardt | Paulo Thiago | Mike Swick | Demian Maia | Dan Miller | Matt Serra | Frank Trigg | Mac Danzig | Justin Buchholz | Melvin Guillard | Ronys Torres | Robert Emerson | Phillipe Nover | Phil Davis | Brian Stann | Chris Tuchscherer | Tim Hague | Joey Beltran | Rolles Gracie, Jr.