who played ryan's brother in the oc
Trey Atwood Trey Atwood is a fictional character on the FOX television series The O.C., portrayed by Bradley Stryker during season one and by Logan Marshall-Green from season two onward. Trey is the older brother of main character Ryan Atwood and grew up with him in Chino with their mother, Dawn Atwood.
Dean Winters He is known for his role as Ryan O'Reily on the HBO prison drama Oz, and has also appeared on such television series as Rescue Me, 30 Rock, and Law & Order: Special Victims Unit, as well as the character "Mayhem" in a series of Allstate Insurance commercials. Winters co-starred with Josh Duhamel in one season of the CBS Network cop drama series Battle Creek.