Madison Roller Derby (MRD), founded as "Mad Rollin' Dolls", is a women's flat-track roller derby league based in Madison, Wisconsin. Founded in 2004, Madison is a founding member of the Women's Flat Track Derby Association (WFTDA), and was the fourth league to join the fledgling organization. Since 2006, Madison has qualified for the WFTDA post-season every year, including three appearances at WFTDA Championships.