<Tr> <Th> </Th> <Td> January 26, 1951 (1951 - 01 - 26) (age 67) Wisconsin U.S. </Td> </Tr> <Tr> <Th> Occupation </Th> <Td> Actor </Td> </Tr> <P> Patrick Thomas O'Brien (born January 26, 1951) is an American actor . He is perhaps best known for playing the role of Mr. Dewey, the math teacher from Saved by the Bell . </P> <P> O'Brien was born in Wisconsin and graduated from Regis High School in Eau Claire . He then attended the University of Wisconsin - Eau Claire receiving his B.A. in 1975 . O'Brien has appeared in several films including Stuart Little, The Curious Case of Benjamin Button, Catch Me If You Can and Kiss the Girls . Despite several movie appearances, the majority of O'Brien's career has centered on television . To name just a few T.V. shows, he has appeared on Monk, It's Always Sunny in Philadelphia, Sabrina the Teenage Witch, The Gilmore Girls, The West Wing, Baywatch, Boston Common and Home Improvement . His most notable quote from Saved By The Bell was, "Neil! Don't mess with the' Dew - Man'!" </P>

Who played mr dewey on saved by the bell