Rugby Scrum Positions Explained: Numbers 1 to 8 and the Scrum-Half

In a full 15-a-side rugby union scrum, eight forwards bind in three positional units: three front-row players, two locks and three back-row players. The scrum-half stands outside that formation to put in or retrieve the ball. World Rugby Law 19 sets out those positions and their required binds, while allowing fewer scrum participants in some circumstances (World Rugby Law 19).

Viewed from behind your own scrum, the usual layout is:

               Opposition

     1 Loosehead   2 Hooker   3 Tighthead
            4 Lock       5 Lock
       6 Flanker             7 Flanker
                  8 Number 8

              9 Scrum-half

The flankers may be described as blindside and openside according to the team’s system and the scrum’s position on the field. A shirt number does not always tell you which side that player will pack on.

Front row: loosehead, hooker and tighthead

Loosehead prop — No. 1

The loosehead packs on the left of the hooker, viewed from behind their own scrum. Their head is outside the opposing tighthead, leaving one side of their head “loose.”

Their job is to:

• bind firmly with the hooker and opposing prop;
• provide a stable connection for the lock behind;
• stay square and transmit force through the unit;
• move forwards or backwards under control rather than chasing an angle.

At engagement, the loosehead places the left arm inside the opposing tighthead’s right arm and grips the back or side of that player’s jersey (World Rugby Law 19).

Hooker — No. 2

The hooker packs between the props and binds to both with both arms. Once the ball touches the ground in the tunnel, a front-row player may strike for it. The hooker on the team throwing in must strike for the ball.

The hooker also helps coordinate the front row’s timing and shape. Before engagement, look for a front row that is square, stable and stationary, with heads and shoulders no lower than hips. The hooker must also use the required brake foot until the referee’s “set” call (World Rugby Law 19).

Read the hooker role and skills guide for how the scrum task connects to lineouts and open play.

Tighthead prop — No. 3

The tighthead packs on the right of the hooker. Their head fits between the opposing loosehead and hooker, putting both shoulders inside the contest—hence “tighthead.”

The tighthead maintains connections with the hooker, lock and opposing loosehead while keeping hips and shoulders square. At engagement, the tighthead places the right arm outside the opposing loosehead’s left upper arm and grips the jersey at the back or side (World Rugby Law 19).

Front-row positions are specialist contact roles, not interchangeable spaces for untrained players. Teams are responsible for ensuring that front-row players and replacements are suitably trained and experienced. If a team cannot field a suitably trained front row, scrums become uncontested (World Rugby Law 3).

Second row: the locks

Locks — Nos. 4 and 5

The locks pack behind the front row, one behind each prop, with their heads on either side of the hooker. Law 19 requires them to bind to each other and to the props immediately in front.

Their task is to keep that connection intact as the scrum moves. Useful checkpoints are:

• shoulders remain connected to the prop rather than dropping away;
• hips point in the direction of the drive;
• both locks move together;
• pressure travels straight and parallel to the ground, as required by law.

Do not treat “push harder” as a substitute for connection. If the locks begin at different heights or lose their binds, the unit cannot transfer pressure cleanly.

Back row: flankers and number eight

Flankers — Nos. 6 and 7

A flanker packs on each outer side of the scrum. Each must bind on a lock’s body with at least one arm and maintain that bind while the scrum continues (World Rugby Law 19).

Once the scrum ends, the flankers move into their first attacking or defensive assignment. A useful sequence is: bind, support, then release into the next role. Do not detach early to gain a head start. The flanker role and training progression covers that transition in more detail.

Number eight — No. 8

The number eight packs centrally behind the locks and binds to a lock with at least one arm. This player completes the back-row connection and often controls the ball as it reaches the base.

The number eight may:

• control the ball with the feet while it remains in the scrum;
• make it available to the scrum-half;
• pick it up from the feet of a second-row player, which ends the scrum;
• attack from the base once the ball is picked up.

Scrum-half — No. 9

The scrum-half has a central scrum role but is not one of the eight bound forwards. The scrum-half awarded the put-in throws the ball into the tunnel. After possession is secured, that player will commonly move towards the base to pass, run or kick.

The throw must meet Law 19’s requirements, including being made without delay, with one forward movement and so that the ball first touches the ground inside the tunnel (World Rugby Law 19).

A no-force formation walkthrough

Use this only as a recognition exercise under a qualified coach—not as a self-taught live scrum.

Setup: Mark a centre line. Place the three front-row players, then the locks, flankers and number eight. Keep the opposition out and apply no shove.

Action: Each player identifies their position aloud and establishes only the coach-approved binds between teammates. Walk through the ball’s route from the tunnel to the base while the scrum-half rehearses moving around the formation.

Checkpoint: From behind, the coach should see the front row square, each lock connected to the prop in front, both flankers attached to locks and the number eight centred at the back.

Do not progress to opposition, engagement or resistance until players have been trained for their positions and the coach has checked the rules for their age, union and competition. Under World Rugby’s Under-19 variation, all front-row players and locks must be suitably trained for those positions, and a full eight-player scrum must form 3–4–1 rather than relying on the standard law’s broader description of three front-row, two lock and three back-row positions (World Rugby Under-19 Law 19).

Once players know where they fit, the next task is coordinated straight pressure—not trying to manufacture a turn. See straight drive versus wheeling.