Jo-Lonn Dunbar of the St. Louis Rams has been suspended without pay for the first four games of the 2013 regular season for violating the NFL policy on performance enhancing substances. Dunbar will be eligible to return to the Rams’ active roster on Friday, September 27 following the team’s September 26 game against the San Francisco 49ers. Dunbar is eligible to participate in all offseason and preseason practices and games.