Patrick Thomas O'Brien
Patrick Thomas O'Brien | |
|---|---|
| Born | 1951 (age 73–74) Wisconsin U.S. |
| Occupation | Actor |
| Years active | 1976–present |
Patrick Thomas O'Brien (born 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.