After leaving Mystery Science Theater 3000, he went on to become a writer for My Guide to Becoming a Rock Star, Malcolm in the Middle, and the critically acclaimed NBC dramedy Freaks and Geeks. He has also been the head writer for America's Funniest Home Videos and NBC's late night show Later with Greg Kinnear.
Weinstein has an extensive background in stand-up comedy; he has performed over a thousand shows as a stand-up comedian, and has also written material for Garry Shandling, Dennis Miller, Roseanne Barr, Louie Anderson and other comedians. He is currently the president of Stinkburger Inc.
Weinstein co-hosts the podcast Thought Spiral with comedian Andy Kindler.