<P> Dean Gerard Winters ( born July 20 1964 ) is an American actor . 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 . </P>
<P> Dean Gerard Winters ( born July 20 1964 ) is an American actor . 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 . </P>
who is the actor that plays mayhem on the allstate commercials
who is the actor that plays mayhem on the allstate commercials
Dean Gerard Winters
Dean Gerard Winters