Herschman is perhaps most known for his role as Glen in the 2006 film, Accepted. Adam also stars as Archie in Harold & Kumar Escape from Guantanamo Bay, Phillip in Soul Men and as Mr. Pickle's employee in I Now Pronounce You Chuck & Larry. He has also appeared in the extended version of Walk Hard: The Dewey Cox Story as Jerry Garcia. He has an appearance in the 2009 film House Broken. In 2015, Herschman appeared in Hot Tub Time Machine 2 as J-Bird.