Bulger sat out last week's game with a concussion, but returned to practice last week. He started feeling worse near the end of the week, and was listed as inactive.
Second-string quarterback Gus Frerotte replaced Bulger last week against Atlanta, but injured his throwing shoulder. He was listed as the backup Sunday.
Berlin, an undrafted player out of Miami, signed with the Rams as a free agent in May. He also has spent time with Miami and Dallas.
Copyright 2007 by The Associated Press