Mark Nelson
- Luogo di nascita:
- Westwood, New Jersey, USA:
 | The Evil Three (2024) Darryl Wells |
 | Lingua Franca (2020) Roman |
 | Blue Pig (2019) Father |
 | The Rewrite (2014) Josh |
 | The Invention of Love (2001) Chamberlain |
 | The First Wives Club (1996) Eric Loest |
 | The Seventh Coin (1993) Librarian |
| | Largo Desolato (1990) Bertram |
 | Bloodhounds of Broadway (1989) Sam the Skate |
 | The Chosen (1981) Fighting Student |
 | Friday the 13th (1980) Ned |