Women's Flat Track Derby Association
The Women's Flat Track Derby Association (WFTDA) is the international governing body for the sport of women's flat track roller derby. It sets the international standards for rankings, rules, and competition in the sport, and provides guidance and resources to aid development of roller derby.
Women's Flat Track Derby Association logo
Roller derby is a roller skating contact sport played on an oval track by two teams of five skaters. It is played by approximately 1,250 amateur leagues worldwide, mostly in the United States.
A roller derby scrimmage in Utah (2012)
A Charm City All Stars (Baltimore, Maryland) blocker vs. a Rhode Island Riveter (Providence, Rhode Island) jammer (2008)
Two jammers (from the Oly Rollers and Rainy City) race from the jammer line (2011)
Lonestar Rollergirls in Austin, Texas, play on a banked track (2011). The jammer (wearing the starred helmet cover) is trying to pass a pivot (wearing a striped cover) with various blockers assisting.