Jamar Law is a kid who is famous at Greg's school for getting his head stuck in a chair and having to get cut free with the help of the janitor. Erika Hernadez also dumped him after the incident. He re-appears in Hard Luck, where Greg is desperate to lure him into getting his head stuck in a chair again so he could get a photo for the yearbook.
- Jamar Law has a little hair on his round head and a long nose.
- In Hard Luck, his teeth aren't shown. However, this could be an error.