Dean Winters born July 20 1964 is an American actor who is known for his roles as Bobby on the YouTube series Wayne Detective Brian Cassidy on Law Order SVU Detective Russ Agnew on Battle Creek The Vulture Detective Pembroke on Brooklyn NineNine Charley Dixon on FOXs Terminator The Sarah Connor Chronicles Dennis Duffy on NBCs 30 Rock Johnny Gavin on FXs Rescue Me Ryan OReily on HBOs Oz He also portrays Mayhem in Allstate commercials
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