Dean Winters (born July 20, 1964) is an American actor, who has portrayed Ryan O'Reily on HBO's Oz, Johnny Gavin on FX Network's Rescue Me, and Dennis Duffy on NBC's 30 Rock. He also currently portrays "Mayhem" in Allstate commercials. read full bio here.

Recent Sightings

10 months ago

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Spotted: Dean Winters biking in Union Sq

OMGICU Note: Dean is skilled in boxing and tai chi

3 years ago

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dean winters aka dennis duffy from 30 rock today on hudson and king. he was riding a bike. on the sidewalk.