Section 1: Introduction
Flat track roller derby is a full-contact team sport played on quad roller skates around an oval track. The modern flat track game is governed by the Women's Flat Track Derby Association (WFTDA), whose current rule set — The Rules of Flat Track Roller Derby, effective January 1, 2025 — is the authoritative reference used by member leagues worldwide for sanctioned play, including WFTDA Championships.
The objective of the game is for a team's Jammer to score points by lapping members of the opposing team while that team's Blockers work simultaneously to help their own Jammer through the pack and to prevent the opposing Jammer from passing. Roller derby is therefore played on offense and defense at the same time by the same skaters, a structural feature that distinguishes it from most other team sports.
A bout consists of a series of short, intense engagements called Jams, each lasting up to two minutes, contested within two 30-minute periods. Strategy centers on the constantly shifting group of Blockers known as the Pack, and on the "Engagement Zone" that defines where legal blocking may occur relative to that Pack.
Section 2: Equipment
Per Section 1.2 of the WFTDA rules, "Skaters must wear quad-style roller skates and protective gear during play." Inline skates are not permitted; only quad-style roller skates satisfy the equipment requirement.
Required protective gear consists of a helmet, mouthguard, wrist guards, elbow pads, and knee pads, provided the item offers the skater additional protection and the skater is physically able to wear it. A skater is not penalized if a specific piece of equipment does not provide additional protection given their body or medical circumstances. Protective gear may not be removed during play, and no piece of equipment may impair the safety of other participants or the flow of the game.
A skater sent to the Penalty Box must replace their mouthguard before leaving the box to re-enter play, reflecting the rule's emphasis on maintaining full protective coverage at all times a skater is active on the track.
Every skater must also be uniquely identified by a roster number for the duration of the game, which officials and scorekeepers rely on throughout to track penalties, scoring passes, and lineups.
Section 3: Playing Area
Flat track roller derby is played on a flat (non-banked) oval track, distinguishing it from the historical banked-track version of the sport. Section 2 of the WFTDA rules requires that the track "conform to the standardized dimensions of the WFTDA Track Specifications," a companion technical document maintained by WFTDA that defines the precise track diagram; the core rulebook itself specifies the track's functional characteristics rather than a single fixed length and width.
The track surface must be flat, clean, and suitable for roller skating. Boundary lines marking the inside and outside edges of the track must be in high contrast to the floor, and the boundary lines themselves count as part of the in-bounds track.
Two features of the WFTDA rules define legal play areas dynamically, relative to the skaters themselves, rather than to fixed marks on the floor:
- The Pack is defined as "the largest group of In Bounds and Upright Blockers in proximity and containing members from both teams," with proximity meaning "not more than 10 ft (3.05m), in front of or behind the nearest Pack Skater."
- The Engagement Zone "extends forward and backward 20 ft (6.10m) from the foremost and rearmost Pack Skaters, respectively," and defines the area in which it is legal for Blockers to engage or be engaged by opponents.
Because the Pack and Engagement Zone move with the skaters, the legal blocking area continuously shifts during a Jam, requiring officials to track its boundaries in real time rather than referencing static track markings alone.
Section 4: Players & Officials
Per Section 1.2, for each Jam a team must field one Jammer and at most four Blockers, for a maximum of five skaters per team on the track at a time. A team must always have at least one Blocker on the track who is not currently serving a penalty.
One of the four Blockers may be designated as the Pivot. The Jammer is the skater in visible possession of the Jammer helmet cover (the "Star") at the start of the Jam and is the only skater eligible to score points. The Pivot is the Blocker in possession of the Pivot helmet cover (the "Stripe"); the Pivot may take control of the Star from the Jammer through a legal Star Pass and become the Jammer mid-Jam. All remaining skaters are simply Blockers. Skaters must be completely on the track at the Jam-starting whistle to be counted toward their team's on-track total for that Jam.
Officiating crew: Per Section 5.1, each game must staff enough on-skates officials (Referees) to effectively track, in real time, information including the location of the Pack, which Blockers are out of play, the identity and status of each Jammer, Lead Jammer status, and scoring. One Referee is designated Head Referee, with authority over crew communication, expulsions, and — following the January 1, 2025 rules update — discretion to act on safety concerns as they arise.
Per Section 5.1.2, each game must also staff enough Non-Skating Officials (NSOs) to track the state of the game so that the rules can be enforced accurately in real time, including official score, jam time, period time, penalty tracking, ineligible skaters, and penalty duration. The rules deliberately leave exact crew size to the needs of the venue and available technology rather than mandating a fixed number of officials.
Section 5: Rules of Play
A game lasts 60 minutes of total play, divided into two 30-minute periods separated by a halftime. Within each period, play is broken into Jams. A Jam can last up to two minutes, and at least 30 seconds must elapse between the end of one Jam and the start of the next.
Each team is allotted three timeouts of 60 seconds each per game, and both teams begin each period with one Official Review, which a team may use to formally challenge a prior officiating decision.
Lead Jammer: The first Jammer to legally establish superior position to the foremost in-play Blocker, after having had the opportunity to earn a pass on all opposing Blockers without committing a penalty, is designated Lead Jammer. The Lead Jammer alone has the authority to call off the Jam before the full two minutes elapse, signaled by repeatedly placing both hands on the hips.
Overtime: If the score is tied at the end of the second period, play is extended by at least one additional Jam. During overtime Jams, the lineup period is extended to 60 seconds, no Lead Jammer is designated, and both Jammers may score on their first earned scoring pass. Additional overtime Jams are played until the score is no longer tied. The team with the most points at the end of the game is the winner.
Section 6: Scoring
Per Section 3.1, a Jammer earns one point every time they legally lap an opposing Blocker — that is, pass the same opponent a second time in succession — provided that pass is earned rather than gained through an illegal maneuver. Only the Jammer with possession of the Star may score points.
Per Section 3.2, a Jammer's run through the Pack is organized into "scoring trips." A trip ends when the Jammer exits the front of the Engagement Zone; once a trip is complete, the points scored on it cannot later be changed. If a Jammer who has already exited the front of the Engagement Zone re-enters it from the front, they resume the same trip until they next exit forward.
Per Section 3.3, Blockers may legally avoid conceding points by staying ahead of the Jammer or otherwise preventing an earned pass — but if a Jammer completes an entire trip through the Pack without ever having a legitimate opportunity to earn a pass on a given opponent, the rules award the Jammer that pass regardless.
Per Section 3.4, a Jammer who is serving a penalty is treated as no longer being on the track and cannot earn scoring passes until their penalty time is served and they return to play.
Per Section 3.5, scoring errors may be corrected no later than the end of the Jam following the one in which the error occurred; however, points that were correctly awarded cannot later be retroactively removed.
Section 7: Violations & Penalties
A skater assessed a penalty must serve 30 seconds of Jam time in the Penalty Box; the final 10 seconds of that time must be served standing. Penalty time is only tracked during active Jams and in the pauses between them.
Penalties fall into three broad categories under Section 4:
- Contact Penalties (4.1): Impact to Illegal Target Zones such as the back of the body, head/neck, or lower legs (4.1.1); impact delivered using an Illegal Blocking Zone such as the head/neck, forearms, or lower legs (4.1.2); Other Illegal Contact, including blocking while down, out of bounds, or airborne (4.1.3); Multiplayer Blocks, such as skaters forming an illegal wall (4.1.4); and Unsporting Contact, covering actions such as pinning an opponent or dangerous jabbing with an elbow or knee (4.1.5).
- Game Structure Penalties (4.2): Illegal Positioning and taking an unblockable position (4.2.1); Gaining Position, including cutting the track (4.2.2); Interfering with Game Flow (4.2.3); and Other Illegal Procedures (4.2.4).
- Unsporting Conduct / Misconduct (4.3): Disrespect toward participants, deception of officials, abusive behavior, or forceful contact directed at officials.
A skater who accumulates seven penalties over the course of a game fouls out and takes no further part in play. Separately, officials may issue an outright Expulsion for sufficiently dangerous or unsporting acts, which removes the skater from the game immediately; a teammate must serve any remaining associated penalty time on the expelled skater's behalf.
Section 8: Safety Considerations
WFTDA's rules build safety directly into the structure of legal play rather than treating it purely as an equipment checklist. The prohibition on inline skates and the mandatory use of quad-style skates (Section 1.2) reflects the control and stability requirements of full-contact play on a flat track.
Mandatory protective gear — helmet, mouthguard, wrist guards, elbow pads, and knee pads — must be worn whenever it can provide the skater additional protection, may not be removed during play, and must not compromise the safety of other participants. Skaters must replace their mouthguard before leaving the Penalty Box, ensuring full protective coverage resumes the instant they re-enter live play.
The Contact Penalty framework in Section 4.1 exists primarily as a safety mechanism: Illegal Target Zones (back of the body, head/neck, lower legs) and Illegal Blocking Zones (head/neck, forearms, lower legs) are defined specifically to discourage the highest-risk categories of contact, and Unsporting Contact (4.1.5) separately penalizes deliberately dangerous actions such as pinning or elbow/knee jabbing.
Following the January 1, 2025 rules update, the Head Referee holds explicit discretionary authority to act on safety concerns as they arise during a game, in addition to their existing authority over expulsions and crew communication — a change WFTDA made specifically to give officials more direct authority to intervene when a safety issue develops in real time.
