2009 MLL season

Expansion

 * The Toronto Nationals joined the league as an expansion team

Relocation

 * The Washington Bayhawks relocate to Annapolis, MD and were renamed the Chesapeake Bayhawks

Contraction

 * The Los Angeles Riptide, the Philadelphia Barriage, the New Jersey Pride, the Rochester Rattlers and the San Francisco Dragons folded. The Rattlers staff was transferred to the Toronto Nationals expansion team.