Rugby Positions Explained: What Every Number Actually Does
From loosehead to full-back, rugby union positions explained as jobs rather than numbers — what each role involves and how to choose one at an English club.
By CricketTaken EditorialPublished Laws & Pathway20 min read
- Positions on the field
- 15
- Forwards
- 8
- Backs
- 7
- Rugby league positions
- 13
Walk into a clubhouse in Cornwall or Cumbria and ask what the tighthead does, and you will get an answer about pressure, angles and the fact that nobody wants to do it. Ask what the outside centre does and you will get an argument. The fifteen jobs on a rugby union field are not evenly understood, even by people who have watched the sport all their lives, because half of them happen inside a heap of bodies and the other half happen in the two seconds before the ball arrives.
The RFU, the Premiership and every England side at Twickenham use the same positional map. Fifteen roles, eight of them in the pack and seven behind it, each with a defined job at the set piece and a much looser one in open play. The numbers on the shirts are a shorthand for those jobs rather than a property of the players — our page on what each England shirt number means covers that convention and the bench numbering that follows it.
What this page does is describe the work. Not the number, the work.
Eight forwards, seven backs, and what that split actually decides
The division is a set-piece one before it is anything else. Eight forwards exist because a scrum needs eight, and a lineout needs enough of them to lift and contest. Seven backs exist because that is what is left.
In open play the distinction has eroded considerably. Modern props carry the ball more than some centres, locks make passes, and wings arrive at rucks in the middle of the field. But the underlying obligation has not changed: when the whistle goes for a scrum, eight specific players have to be there, and if the front row cannot function the referee orders uncontested scrums and the match becomes something else entirely.
- 3Front row
- 2Second row
- 3Back row
- 7Backline
The standard structural units of a rugby union side. Forwards and backs are fixed by the laws; the sub-units below are conventional rather than legislated.
Forwards are grouped further. The front row and the second row together are the "tight five", the players whose primary job is the scrum and the lineout. The back row is the loose trio, expected to be everywhere. Behind them, the half-backs are 9 and 10, the midfield is 12 and 13, and the back three is 11, 14 and 15.
Those groupings are how coaches talk. A session might be split into tight five, back row and backs, working on entirely different things at the same end of the same pitch.
One thing worth knowing early: positions are less fixed than the shirt suggests. A blindside flanker who can jump becomes a lineout option and changes what the lock at 5 has to do. A full-back who joins the line as a second playmaker changes the fly-half's job. The map is stable; the traffic on it is not.
The front row: loosehead, hooker, tighthead
Three players carrying the most technically demanding and physically hazardous work on the field, and the only three the laws single out for compulsory training.
The loosehead prop wears 1 and packs down on the left of the front row. His head sits on the outside of the formation, with only the opposition tighthead alongside it — the "loose" head. His job is to keep his side of the scrum square and to prevent the opposing tighthead driving in and down. A good loosehead lifts the tighthead slightly, denying him the angle he wants; a poor one gets driven upwards and the scrum collapses or wheels.
The tighthead prop wears 3 and takes his name from where his head goes: between the opposing loosehead and hooker, pressed on both sides. He is the anchor. When a scrum is going backwards, the tighthead is usually the reason; when it is going forwards, he is usually taking the credit. The compressive load through his neck and shoulders is the highest of any position in the sport, which is precisely why clubs from the Premiership down to a Sunday side in Devon cannot find enough of them. A club with two functioning tightheads is a club that can fulfil fixtures.
The hooker wears 2 and does two jobs that have nothing to do with each other. In the scrum he strikes for the ball and helps hold the front row together. In the lineout he throws, and the throw is a genuine skill — a hooker who cannot hit a jumper at the tail costs his side more possession than one who scrummages indifferently. He is usually also the loudest voice in the pack, calling lineouts and organising the drive.
World Rugby's Law 3 requires that a team naming a full bench includes enough front-row-trained players to replace all three positions. If it cannot, the referee orders uncontested scrums, which changes the sport for the remaining eighty minutes. There is nothing symbolic about this — it exists because untrained necks break. The mechanics of the engagement sequence and the offences that follow it are in our guide to the scrum laws.
Locks at 4 and 5: the engine room and the lineout
Tall, and expected to be relentless.
The two locks bind together behind the front row, with their heads between the props' legs and their shoulders driving into the props' backsides. Everything the front row does in a scrum depends on the locks transmitting force through them cleanly. A lock who binds lazily or pushes at the wrong angle can undo three men in front of him.
Away from the scrum, the locks are the primary lineout jumpers. Conventionally the 4 works at the front and middle and the 5 at the middle and tail, though plenty of English clubs reverse it or split the calling duties differently. They are also the main receivers at restarts, which is a distinct skill — catching a hanging ball in a contested aerial collision with a chasing forward arriving at speed is not the same as jumping in a lineout with two men lifting you.
In open play they carry, clear rucks and tackle. The workload is unglamorous and enormous. A second row who does not make double-figure tackles and double-figure ruck arrivals in a match has had a quiet afternoon.
Height helps but is not the whole story. Timing off the ground, core strength through the lift and the ability to adjust in the air matter more than raw inches, which is why a well-drilled 6ft 5in lock beats a poorly drilled 6ft 8in one at a lineout more often than the tape measure suggests. The calling systems, the numbering of the pods and the offences around the lift are covered in our page on the lineout laws.
The back row: 6, 7 and 8, and why the three jobs differ
The loose forwards. Three players who bind onto the scrum but whose real value is measured in what they do once it breaks up.
The openside flanker, at 7, binds on the side of the scrum nearest the wider portion of the field and is expected to arrive at the breakdown first, every time. Competing for the ball on the ground — the jackal — is the defining skill, and it is a body-shape advantage as much as a technical one: a shorter, thicker player gets over the ball with a lower centre of gravity and is harder to shift. England have produced a long line of them and the position remains the one most argued about in selection.
The blindside flanker, at 6, works the narrow channel. He defends the short side at scrums, carries into traffic, hits rucks with intent and is often a lineout option in the middle of the line. The traditional English 6 is bigger than the 7 and does the physical, repetitive work that makes the openside's turnovers possible.
The number eight binds at the back of the scrum with his head between the two locks. He controls the ball at the base, choosing whether to release it to the scrum-half or pick and drive himself, and he is usually the pack's most reliable ball-carrier in open field. The eight links the forwards to the half-backs more than any other forward.
Those distinctions are conventional rather than legislated, and they blur constantly. Sides pick two opensides and accept less lineout ballast. Others pick a lock at 6 to win more lineout ball and accept less speed to the breakdown. What a coach is really choosing between is turnover threat and set-piece security, and there is no correct answer — the balance depends on whether the referee that afternoon is rewarding the jackal or the cleanout. Which he does is a question of interpretation, and interpretation is exactly what the breakdown laws leave room for.
Scrum-half: the 9 and the tempo of the match
Smallest player on the field, usually. Loudest, definitely.
The scrum-half's basic obligation is delivery: getting the ball from the base of a ruck, scrum or maul into the fly-half's hands, accurately and at the speed the game plan requires. A pass that arrives a fraction late gives the defence time to set. A pass that arrives at chest height instead of below it costs the receiver a stride. These are small things that compound across eighty minutes.
Box kicking has become the second defining skill, and in the English and wider northern-hemisphere game it may now be the first. A nine standing behind a ruck with a protective shield in front of him, hoisting a contestable ball for a chasing wing, is one of the most-repeated sequences in the sport. Get the height and hang time right and you turn defence into an aerial contest fifty metres upfield. Get it wrong and you have given the ball away with your forwards facing the wrong way.
Around the fringes the nine is also a threat in his own right. A defence that fails to guard the short side of a ruck invites a snipe, and the best scrum-halves spend the whole match looking for a defender standing marginally too square.
The last part of the job is verbal. The nine talks to the pack about where the ball is going, talks to the referee about what the opposition are doing, and generally sets the emotional temperature of the side. A quiet scrum-half is a contradiction in terms.
He is also, defensively, in an awkward spot. The scrum-half usually guards the fringe of the ruck, which means he is the smallest player in the side standing in the channel a number eight most wants to run through. Some coaches solve this by pushing the nine into the back-field as a third sweeper and asking a flanker to guard the fringe instead. Others accept the mismatch and rely on the nine's tackle technique, which at senior level has to be genuinely good rather than merely willing.
The nine and ten are picked as a pair more often than any other combination on the field. They share the decision about whether a phase goes wide, goes to the forwards or goes into the air, and a half-back partnership that has played fifty matches together makes that decision faster than two better individual players who have not. English clubs guard those pairings carefully in selection, and losing one of them mid-season tends to cost more than the individual replacement suggests.
Fly-half: the 10 and the decisions nobody else makes
Every attacking sequence passes through him, and the consequences of his choices are visible in a way no forward's are.
The fly-half receives from the nine and decides. Pass flat and put the midfield into space. Pass deep and give them time but let the defence come up. Kick for territory. Kick behind the wings. Take the ball to the line himself. Each of those is available on almost every possession, and choosing wrongly is more damaging than executing imperfectly.
He also sets the shape. How deep the backline stands, how wide it spreads, whether the forwards are running short lines off him or holding width — the ten's alignment tells the whole attack what kind of phase this is going to be.
Most sides also give him the goal kicking, though that is convention rather than requirement and plenty of English clubs kick from 15 or 12 instead. Where the goal kicker stands matters for a reason that has nothing to do with the kick: a ten who is also the kicker spends a portion of every stoppage on his own routine rather than talking to his forwards.
Kicking from hand is the technical foundation. Territory in rugby union is won and lost with the boot, and a fly-half who cannot find touch from a penalty inside his own 22 hands his pack twenty metres of work they should not have to do.
Twelve and thirteen are not the same position
The two centres get lumped together and should not be.
The inside centre at 12 sits closest to the fly-half and English clubs have used two very different models for him. One is the second playmaker: a distributor who can pass off both hands, kick, and give the ten a decoy option that genuinely threatens. The other is the crash-ball carrier: a heavy runner used to make ground through the first defender and set quick ruck ball. Both work. What does not work is picking one model and coaching the other.
The outside centre at 13 has the hardest defensive job in the backline. The 13 channel is where a drifting defence and a rushing defence meet, and the outside centre has to decide, in about half a second, whether to push out onto the opposition 13 and trust his winger, or hold inside and shut the switch. Get it wrong and there is nobody behind him except the full-back. He also needs genuine pace, because he is the last midfielder with a chance of catching a break.
The two are not interchangeable, and a coach asking his 12 to cover 13 is asking for a different set of instincts. That said, the modern trend towards two big midfielders who can both distribute has blurred the line, and some English clubs now select what is effectively a 12/13 hybrid twice and let the alignment sort itself out.
Defensively, the midfield is where the line either holds together or falls apart. Everything outside them is reactive.
The back three: wings and full-back
Eleven, fourteen and fifteen work as a unit even though they are separated by fifty metres of pitch.
Wings finish, and that remains the headline. But the modern winger's day is dominated by the air and by back-field cover. When the opposition kick long, one wing drops to help the full-back and the other stays up to chase. When his own side kicks, he is competing for a ball dropping out of a grey Twickenham sky with a full-back who has had a better view of it than he has. Wings also come infield to carry from the base of a ruck, particularly in the first phase after a lineout, because they are often the freshest ball-carriers on the field.
The full-back at 15 is the last line and the first counter-attacker. He fields high kicks, which is a specialist skill involving a standing jump into contact with a chaser arriving at full speed. He sweeps behind the defensive line, covering the space the wings vacate when they push up. And when the opposition kick badly, he is the player who decides whether to run it back, which is the single highest-variance decision available to any back.
The three of them rotate constantly in defence — the pendulum, in coaching shorthand. If the ball is on the left, the left wing pushes up, the full-back covers behind him and the right wing drops deep to guard the far corner. If the ball moves right, the whole arrangement swings the other way. When you see a try scored into an empty corner, the pendulum has usually swung late.
Full-back is also the position that most rewards positional intelligence over athleticism. A quick player in the wrong place is slower than a moderate one in the right place.
There is a further split in how wings are picked that rarely gets explained. Some sides select a left wing and a right wing and keep them there all match, which suits players with a strong side for kicking and stepping. Others select a blindside wing and an openside wing who swap depending on which way the attack is set up, so that the better aerial player is always on the side the ball is most likely to come down. Neither is more correct, but the two systems ask for different players, and a winger arriving at a new English club sometimes discovers he has been signed to do a job he has never done.
The full-back's kicking game matters more than the highlight reels imply. A 15 who can find touch under pressure from his own in-goal saves his forwards a fifty-metre retreat, and one who can put a long spiral behind an advancing back three turns a defensive set into an attacking one. In the northern-hemisphere game, where weather makes territory decisive for months at a time, a full-back with no left foot is a limitation the opposition will find by half-time at a wet Kingsholm.
Body types, and the myths worth ignoring
The most persistent myth about rugby is that you have to be large. The sport's actual claim is stranger and better: it has a competitive place for a 5ft 8in openside flanker with a low centre of gravity and for a 6ft 8in lock who cannot sprint.
| Position group | What the role actually needs | Common myth |
|---|---|---|
| Front row | Neck and shoulder strength, technical scrummaging training, patience | That size alone qualifies you |
| Second row | Height, jumping timing, aerobic capacity for a high work rate | That it is a place to hide a slow player |
| Back row | Work rate, tackle technique, breakdown skill, decision-making | That all three back-row jobs are the same |
| Half-backs | Passing accuracy, kicking range, game understanding | That they need to be small |
| Midfield | Defensive reading, contact tolerance, distribution | That the 12 has to be the bigger one |
| Back three | Aerial skill, positional judgement, finishing pace | That wings only need to be fast |
Two myths deserve killing outright. The first is that props are slow and unfit; a modern Premiership prop covers ground, makes tackles across the width of the pitch and carries in traffic, and the ones who cannot do not last. The second is that the second row is where you put the heaviest available body. Locks jump, lift and run all afternoon, and a lock without aerobic capacity is a lock who disappears after fifty minutes.
The one genuine physical gate is the front row, and it is a safety requirement rather than a snobbery. Nobody should scrummage at senior level without completing the training the RFU requires, and a coach who puts an untrained player in at tighthead to make up the numbers is being negligent rather than resourceful.
Choosing a position as a new player at an English club
Turn up at a club in September and you will be asked two questions: have you played before, and how big are you. Both are the wrong questions, but they are the ones that get asked.
- First training sessionThe coach watches you move, tackle and handle. Nobody is deciding anything permanent yet.
- Trial in a general roleMost new adults get tried at flanker or in the centres, where work rate matters more than technique.
- The squad's actual gapsWhat the club is short of shapes the offer. Front rows and second rows are the perennial shortage in England.
- Front-row training if relevantScrummaging is taught separately and formally before anyone plays there. This is not optional.
- Second and third team rugbyPositions get tested over several weeks of real matches rather than in one session.
- Settling, or notPlenty of players move position two or three times in their first two seasons. That is normal, not failure.
The typical route at a community club. Individual clubs run this differently, and some assess more formally than others.
The honest advice is to start where your existing athleticism fits and stay flexible. Flanker and centre are the usual entry points for adults because both reward tackling and work rate, which transfer from other sports. Wing suits someone quick who wants fewer decisions while they learn the laws. Scrum-half and fly-half are positions you grow into rather than arrive in, because both demand a reading of the game that only comes from playing it.
If you are considering the front row, consider it properly. It is the most secure position in English club rugby in terms of getting selected, for exactly the reason that makes it demanding, and clubs will invest coaching time in anyone willing. Just do the training first.
For the practical steps of finding a club, the formats available and what to expect from a first season, see our guide to starting to play rugby in England. For younger players, the positional picture is shaped by the age-grade framework, where contact and set piece are introduced in stages — that is set out in the RFU's age grade rules.
How rugby league numbers the same field differently
Thirteen players, a different governing body and a positional map that runs the opposite way round.
Rugby league numbers its backs first. The full-back wears 1, the wings 2 and 5, the centres 3 and 4, the stand-off 6 and the scrum-half 7. The forwards then run from 8 to 13: two props at 8 and 10, the hooker at 9, two second rows at 11 and 12, and the loose forward at 13. Union numbers the pack first and the backs afterwards; league does the reverse, which is a small thing that confuses a lot of people watching their first Super League match.
| Number | Rugby union | Rugby league |
|---|---|---|
| 1 | Loosehead prop | Full-back |
| 2 | Hooker | Right wing |
| 6 | Blindside flanker | Stand-off |
| 7 | Openside flanker | Scrum-half |
| 9 | Scrum-half | Hooker |
| 13 | Outside centre | Loose forward |
The jobs differ as much as the numbers. There are no flankers in rugby league and no openside jackal, because the tackle is completed differently and the ball is played back with the foot rather than contested on the ground. The league hooker is the dummy-half, the player who picks the ball up at every play-the-ball and decides where it goes — a distribution role closer to a union scrum-half than to a union hooker. League props carry and tackle in shifts rather than scrummaging competitively, since the scrum in league is a restart rather than a contest, as our page on rugby league scrums explains.
Replacements work differently too. Union names a bench of eight, numbered 16 to 23, with permanent substitutions except in defined circumstances. League uses a capped number of interchanges from a smaller bench, and the cap has been reduced more than once by the RFL as part of its management of collision load, so do not assume a figure without checking the current competition rules. The wider set of differences between the codes as played in England is covered in our comparison of the two rulebooks.
What the shirt tells you, and what it does not
A team sheet gives you the set-piece plan and nothing else.
Number 4 tells you that player packs down in the second row and will jump in the lineout. It does not tell you whether he is the lineout caller, whether he is a specialist restart receiver, or whether the side intends to run their forward carries through him. Number 12 tells you he starts inside centre. It does not tell you whether he is a playmaker or a battering ram, and those are two different teams.
Watch the first ten minutes and the real roles emerge. Which flanker is arriving first at the breakdown. Which centre is doing the talking in defence. Whether the full-back is standing flat as a second distributor or deep as a sweeper. Whether the hooker or a lock is calling the lineout. None of it is on the shirt.
That is the useful thing about learning the positions properly rather than memorising the numbers. The numbers give you a map. The map tells you where everyone starts, and the match tells you what they actually do — including how they turn possession into points, which is the subject of our guide to how rugby union scoring works. More across the code sits in the rugby section and on the England guides hub.