Roller derby: The rules

A roller derby game pits two teams of up to 14 players against each another on an oval track. Five members from each team simultaneously…

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Roller Derby: The rules - BBC Sport

The Basics of Roller Derby by Nicolas Fnic Rossert — Kickstarter

Roller Derby Referee OPR Rotation

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Karen Ironside on LinkedIn: Might be odd to post this here but if you live in commuting distance to…