The league was founded in March 2010, by Trudy Hannon (Joanie Trash) and Kyla Sinclair (Dutch Courage).
[1][2] The league began training in cramped conditions at Bell Hall until a new rink was opened at the Palmerston North Leisureplex in January 2011.
[2] In July 2011 the Swamp Rats played their first competitive bout against Mountain City Rollers and Mount Militia Derby Crew in New Plymouth.
[3][6] August 2012 saw the Swamp City Roller Rats host the country's first national tournament, dubbed Derby Royale, with 13 teams from all over New Zealand participating.
Swamp City's team The Plague were runners up in the competition, losing to Auckland Roller Derby League in the final.