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Rugby Positions by Number: Who Wears What and Why

Shirt numbers one to fifteen map to fixed roles in rugby union. What each position does, and the body types and skills each one selects for.

By Published 5 min read

Reign Creative LLC makes 24-0 Rugby Draft Pro League, which this article links to, so we have a commercial interest in it. How we write and check articles.

Key takeaways

  • In rugby union, shirt numbers 1 to 8 are the forwards and 9 to 15 are the backs, with replacements numbered 16 to 23.
  • The eight forwards are exactly the eight players who must form the scrum, which is why the pack has a fixed size and the backline does not.
  • Positions select strongly for body type: the front row is built for compression, the second row for height, the back three for pace.
  • Numbering is a role map rather than a squad list, so a player wearing 12 in one match may wear 13 in the next.
  • Any simulation has to decide which of the fifteen roles it can actually tell apart, and being honest about the merges matters more than claiming all fifteen are distinct.

A rugby union shirt number is a job description. There are fifteen players on the field, the forwards wear 1 to 8 and the backs wear 9 to 15, and replacements are numbered 16 to 23. Unlike most team sports, the number does not belong to the player — it belongs to the role, and the player wears whichever one they are starting in this week.

The split at eight is not arbitrary. Eight players from each side must form the scrum, so the pack has exactly eight members by law. Everyone else is a back.

The forwards: 1 to 8

No. Position What the job is
1 Loosehead prop Front row. Pushes in the scrum on the side where the head is outside the opposition's bind.
2 Hooker Front row. Hooks the ball back with the foot in the scrum and usually throws in at the lineout.
3 Tighthead prop Front row. Packs down on the side under most direct scrum pressure.
4 Lock Second row. Height and mass: the main lineout target and the engine of the scrum shove.
5 Lock Second row, as above. Locks are generally the tallest players in the team.
6 Flanker Back row. First to the breakdown, defensive line pressure, ball-carrying in contact.
7 Flanker Back row, as above, usually the more specialised breakdown operator of the pair.
8 Number 8 Binds at the back of the scrum and can pick the ball from its base to launch an attack.

Three things about this group are worth understanding before anything else.

The front row is a specialist trade. Props push, and the hooker secures the ball by hooking it back with their foot. Scrummaging is technical enough that a team without adequate front-row cover is genuinely constrained, which is why replacements are stocked the way they are.

The second row exists to win the ball in the air. Locks are usually the tallest players available and are the primary lineout targets.

The back row is the link. Flankers and the number 8 are expected to be the first players to arrive at a breakdown and to secure possession there. They are forwards by numbering and, in open play, closer to backs in mobility.

The backs: 9 to 15

No. Position What the job is
9 Scrum-half Retrieves the ball from the forwards and delivers a quick, accurate pass to the backline.
10 Fly-half Usually the main kicker and the player who directs the back line.
12 Inside centre Breaks the defensive line and links the fly-half to the wider attack.
13 Outside centre As above, generally with more emphasis on pace and on defending the wide channel.
11 Wing Among the fastest players in the team; scores a large share of the tries.
14 Wing As above, on the opposite flank.
15 Fullback Last line of defence, needs to catch a kicked ball cleanly and kick well in return.

Backs play behind the forwards and are usually more lightly built and faster. Successful backs are skilful at passing and kicking, and the two roles that carry the most decision-making are 9 and 10: the scrum-half decides how quickly the ball leaves a breakdown, and the fly-half decides what happens to it next.

Why body type does so much of the work

Positions in rugby select for physique more directly than in most sports, and it is not snobbery about size — it is what each role physically requires.

A prop needs mass and the ability to generate force from a compressed, static position. A lock needs height, because the lineout is a contest in the air. A wing needs top-end speed, because the whole purpose of moving the ball wide is to create a footrace. A fullback needs to catch a high ball under pressure and clear distance with a kick, which is a different skill set again.

This is why "he is a good athlete, put him anywhere" fails in rugby in a way it does not in some other sports. A quick, powerful player who cannot scrummage is not a prop. The set piece is a law-defined contest and it does not care how fast you are.

What a draft board can and cannot tell apart

Building the draft pool for 24-0 Rugby Draft Pro League meant deciding how many of these fifteen roles the game could genuinely distinguish, and the honest answer was fourteen.

The attributes the pool actually exposes are scrummaging, lineout ability, breakdown work, ball-carrying, defence, distribution, kicking and pace. Those are enough to separate a loosehead from a tighthead — the scrum roles differ in a way the model can express — and more than enough to separate a lock from a wing.

The pair we merged is the flankers. In the data model, 6 and 7 share one profile. In real rugby, the blindside and openside flanker are meaningfully different jobs: one is weighted toward carrying and defensive impact in the tight channel, the other toward contesting possession at the breakdown. We built them separately and could not make the difference survive contact with the season simulator, because the distinction is expressed through team-level patterns — defensive alignment, how quickly a side commits to a ruck — that our model resolves for the squad rather than for the individual.

Rather than ship two attribute profiles that were nearly identical and pretend otherwise, we merged them and stated it. The practical effect on drafting is that you are choosing two flankers rather than a 6 and a 7, so the second one is a depth decision rather than a role decision.

The wings are close to the same problem and stayed separate, because kicking and aerial ability do diverge enough between 11 and 14 in the pool for the choice to mean something.

What this means for you at the board: fourteen distinct role profiles, a $200M in-game salary cap, and a 24-match season that will find any position you left thin. Depth charts covers the general principle of ordering cover behind a starter, and rugby forwards and backs covers why the two halves of the squad need different depth strategies.

Player names and historical details appear in the game for informational purposes; in-game ratings and salaries are unofficial estimates, and the app is not affiliated with or endorsed by any player, club, league, union or governing organisation. For the rest of the studio's management titles, see sports GM.

Good to know

Frequently asked questions

What do rugby shirt numbers mean?
In rugby union the number indicates the position a player is starting in, not their identity. Numbers 1 to 8 are worn by the forwards and 9 to 15 by the backs, with up to eight replacements numbered 16 to 23. The same player can wear different numbers in different matches.
Which numbers are forwards and which are backs?
Forwards wear 1 to 8: two props, a hooker, two locks, two flankers and a number 8. Backs wear 9 to 15: scrum-half, fly-half, two centres, two wings and a fullback.
What does the number 8 do?
The number 8 binds at the back of the scrum and can pick the ball up from its base to start an attack. Along with the flankers, they are expected to be among the first players to a breakdown and play an important role in securing possession.
Who throws the ball in at a lineout?
Usually the hooker, who wears number 2. The ball is then mostly competed for by the locks, who are generally the tallest players in the team.
Can a player play more than one position?
Yes. Players generally specialise in one or two positions that suit their skills and body type, but those who cover several are known as utility players and are valuable precisely because they reduce how many specialists a squad has to carry.

Sources

  1. Rugby union positions (opens in a new tab)Wikipedia — accessed
  2. Scrum (rugby union) (opens in a new tab)Wikipedia — accessed
  3. Laws of the Game (opens in a new tab)World Rugby — accessed

League, team and athlete names appear here only to identify the rules, records and history being discussed. Reign Creative LLC's sports games are not affiliated with, endorsed by or licensed by any league, team, players' association or athlete, and all names and marks belong to their owners.

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