Maryland Area Roller Sports Junior Roller Derby AKA MARS Jr. Derby was founded in 2015 in order to allow children, ages 7-17, the opportunity to learn the sport of roller derby. MARS Junior Roller Derby’s mission is to provide a fun, safe, and supportive environment for young athletes where they can come together and play this highly exciting sport of speed, strategy and teamwork. Junior Roller Derby helps empower our skaters by developing character, social skills, and athletic abilities, building self-confidence, and teaching leadership skills while improving overall fitness.