How Is Roller Derby Played? A Beginner's Guide to the Flat-Track Game

Updated

Roller derby is a full-contact team sport played on quad roller skates on an oval flat track, where two teams of five skaters each field one scorer (the jammer) and four blockers. The team with the most points when the clock runs out wins. Calgary Roller Derby plays under Women's Flat Track Derby Association (WFTDA) rules, and its junior program follows the same rule set with adjustments for contact.

The Basic Structure of a Bout

A game is called a bout, and it's divided into two 30-minute periods. Each period is broken into short scoring bursts called jams that last up to two minutes. Between jams, teams have about 30 seconds to line up for the next one.

Here's what happens in a jam:

  1. The pack lines up. Both teams' blockers start together in a group called the pack. The jammers start behind the pack.
  2. The whistle blows. The pack takes off first, then a second whistle releases the jammers.
  3. The jammer fights through. Each jammer must skate past every blocker in the pack to complete their "initial pass." Until they do, they can't score.
  4. Scoring begins. After the initial pass, the jammer earns one point for every opposing blocker they legally pass on each subsequent lap.
  5. The jam ends. The lead jammer — the first jammer to break through the pack cleanly — can call off the jam early by tapping their hips. Otherwise it runs the full two minutes.

The Roles on the Track

Each team fields five skaters per jam, and every position has a distinct job.

Position How many Job
Jammer 1 Scores points by lapping opposing blockers; wears a star on the helmet
Blocker 3 Forms the pack, defends against the opposing jammer, and helps their own jammer advance
Pivot 1 A blocker who can take over as jammer if needed; wears a striped helmet cover

The lead jammer designation matters because it gives that skater control over when the jam ends — a strategic advantage when their team is ahead in that jam.

How Points Are Scored and How You Win

Scoring is straightforward once you grasp the initial-pass rule:

  • A jammer scores nothing until they complete their first full lap past the pack.
  • After that, each opposing blocker passed = 1 point.
  • Passing the opposing jammer is worth no points — only blockers count.
  • If a jammer is sent to the penalty box, their team skates short-handed, and the opposing jammer can rack up points against a thinner pack.

The team with the higher total at the final whistle wins. Ties are possible in some formats but most WFTDA-sanctioned bouts play to a winner.

What Makes It "Flat Track"

WFTDA rules define the version of derby Calgary Roller Derby plays. Key features:

  • Flat oval track — no banked turns, unlike some historic versions of the sport.
  • Quad skates only — inline skates aren't allowed.
  • Full contact is legal within limits — blocking with the hips, shoulders, and torso is allowed; tripping, elbowing, and hitting above the shoulders are not.
  • Penalties send a skater to the box for a set time, leaving their team short-handed.

Calgary Junior Roller Derby (CJRD) uses the same WFTDA rule set for skaters aged 6–17 of any gender, with contact rules adjusted for younger players.

Seeing It in Action

Calgary Roller Derby's teams — the All Stars (WFTDA travel team), Jane Deere (B-travel), the B-52 Bellas, and the Thrashin' Lassies — compete locally and travel internationally. Watching a bout live is the fastest way to understand the flow, since the pack dynamics and jammer battles are hard to follow on paper.

If you want to try it yourself, Calgary Roller Derby runs new skater training and opens league practices to skaters from surrounding leagues as drop-ins. For questions about joining, volunteering, or officiating, the league can be reached at [email protected].