In 2006 , Gigandet was cast as Kevin Volchok on the Fox teen drama television series '' The O.C. '' , appearing in 15 episodes . Gigandet portrayed the role of Kevin , a bad boy and rebellious competitive surfer who develops a casual relationship with the rich socialite Marissa Cooper , portrayed by Mischa Barton . In August 2007 , Gigandet was cast in the Summit Entertainment action drama film '' Never Back Down '' . He portrayed the role of the villainous bad boy and fighting champion Ryan McCarthy who sets out to take down the film 's protagonist . Gigandet and co-star Sean Faris shared an award for " Best Fight " at the 2008 MTV Movie Awards . In December 2007 , Summit Entertainment cast Gigandet in the planned film adaptation of the best selling vampire book series '' Twilight '' by Stephenie Meyer . He signed on to portray the role of the film 's " tracker " vampire James . Gigandet received his second " Best Fight " award win at the 2009 MTV Movie Awards with Robert Pattinson
2008 MTV Movie Awards
2008 MTV Movie Awards
Cam Gigandet