Dean Winters

• 1 movie
• Acting (1)

Born 1964

Dean Gerard Winters is an American actor. He is known for his role as Ryan O'Reily on the HBO prison drama Oz and his roles in the TV series Millennium, Rescue Me, 30 Rock, Sex and the City, and Law & Order: Special Victims Unit, as well as portraying "Mayhem" in a series of Allstate Insurance commercials and starring in the 2014 film John Wick.