What's Roller Derby?

I took this out of the BCB's book they give out at the games.

The Objectives:
Each pack starts with: 1 pivot from each team (they have stripes on their helmets), and 3 blockers from each team. There is also 1 jammer from each team located behind the pack (they have stars on their helmets).

The whistle blows and the pack is off. Two whistles blow and the jammers start sprinting their way through the pack. The first jammer that gets past the pack (legally!) is your LEAD JAMMER.

When the jammer comes around again, they begin scoring points based on how many opposing players they pass (legally). The jam lasts a maximum of 2 minutes, but the lead jammer can call it off.

At the end of the game, the team with the most points WINS!

POSITIONS:
JAMMER: Tears through the pack & scores points by passing members of the opposing team. She wears the helmet with a star.
PIVOT: Sets the pace for the pack and is the last line of defense. She wears the helmet with a stripe.
BLOCKERS: Tries to stop the jammer and makes life difficult for the opposing team's blockers.