Brian as Flammel from
The Movie From the Future

Roles:
Franky Crosby (Murder Made Easy)
Fritz (Frankenstein's Roommate)
Flammel (The Movie From the Future)
Gary the Thug (Hey, Stop Stabbing Me!)
Buggo (Sledgehammers at Dawn)

Composer:

Magma Head (with Danny Burke)

Yhe Forsaken Zone (with Danny Burke)

Brian won his first role based on one thing, and one thing only... he was Pat's little brother.  Who better to cast as Pat's little brother in Murder Made Easy than Pat's real life little brother? Answer: no one. 

From there Brian has won the rest of his roles usually, well, usually because he was there.  "We need someone to get killed in this scene. Pat, is Brian home?" So on and so forth. This happens a lot in our movies.

Brian, as he matured and became slightly less weird looking, has become a composer and musician. He provided the score for Amazing Schlock's ridiculous short opus, Magma Head, with his writing cohort Danny Burke (who is credited as Danny Belkin because Brian couldn't remember his last name). Since scoring Magma Head, Brian and Danny have sold songs to be used in Coke and Buddy Lee ads. But obviously Magma Head is their proudest achievement.