The Stability of the American Second Division
USL First Division (2006)		NASL (2011)
Atlanta Silverbacks		Atlanta Silverbacks
Charleston Battery		Carolina Railhawks
Miami FC		FC Edmonton
Minnesota Thunder		FC Tampa Bay
Montreal Impact		Miami FC
Portland Timbers		Montreal Impact
Puerto Rico Islanders		NSC Minnesota Stars
Rochester Raging Rhinos		Puerto Rico Islanders
Seattle Sounders
Toronto Lynx
Vancouver Whitecaps
Virginia Beach Mariners
red - folded or relegated		first season in Division 2
blue - folded, returned		second season
green - promoted		third season
no background - remains		more than three seasons