The Game of roller derby
The short version!
A game lasts for 60 minutes. Each jam (time of game play) can last up to 90 seconds There may be as many jams in a game as time permits. Game concludes when final jam ends. Each team fields up to five players on the track for each jam: one Pivot, three Blockers, and one Jammer. Skaters travel counter clockwise on the track. Coming to a standing stop on the track is not permitted. Each team has an active jammer that passes the apposing team members. They will receive 1 point per apposing person they pass. The team with the highest amount of points at the end of the game wins.