Roller derby
Sports
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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 60-minute roller derby game, or bout, is a series of... Wikipedia
Clubs: 4,700+
Contact: Full
Equipment: Roller skates, helmet, knee pads, elbow pads, wrist guards, mouthguard
Nicknames: Derby
Team members: 15 on roster, up to 5 on track during each jam.
Venue: Roller rink, pitch