Loose Head Prop

In the game of rugby union, there are 15 players on each team, comprising eight forwards (wearing jerseys numbered 1–8) and seven backs (numbered 9–15). In addition, there may be up to eight replacement players "on the bench", numbered 16–23. Players are not restricted to a single position, although they generally specialise in just one or two that suit their skills and body types. Players that play multiple positions are called "utility players".

Forwards compete for the ball in scrums and line-outs and are generally bigger and stronger than the backs. Props push in the scrums, while the hooker tries to secure the ball for their team by "hooking" it back with their heel. The hooker is also the one who is responsible for throwing the ball in at line-outs, where it is mostly competed for by the locks, who are generally the tallest players on the team. The flankers and number eight are expected to be the first players to arrive at a breakdown and play an important role in securing possession of the ball for their team.

The backs play behind the forwards and are usually more lightly built and faster. Successful backs are skilful at passing and kicking. Full-backs need to be good defenders and kickers, and have the ability to catch a kicked ball. The wingers are usually among the fastest players in a team and score many of the tries. The centres' key attacking roles are to break through the defensive line and link successfully with wingers. The fly-half can be a good kicker and generally directs the back line. The scrum-half retrieves the ball from the forwards and needs a quick and accurate pass to get the ball to the backs (often firstly to the fly-half).

Early names, such as "three-quarters" (for the wings and centres) and "outside-half" (for fly-half) are sometimes used in the Northern Hemisphere, while in New Zealand the fly-half and inside centre are called "first five-eighth" and "second five-eighth" respectively, while the scrum-half is known as the "half-back".

The scrum (a contest used to restart play) must consist of eight players from each team: the "front row" (two props; a loosehead and tighthead, and a hooker), the "second row" (two locks), and a "back row" (two flankers, and a number 8). The players outside the scrum are called "the backs": scrum-half, fly-half, inside centre, outside centre, two wings, and a fullback.

Overview

There is a maximum of 15 players from each team allowed on a rugby field at any one time. The players' positions at the start of the game are indicated by the numbers on the backs of their shirts, 1 to 15. The positions are divided into two main categories; forwards (numbered 1 to 8) and backs (numbered 9 to 15). In international matches, there are eight substitutes that can replace an on-field team-mate. The substitutes, numbered 16 to 23, can either take up the position of the player they replace or the on-field players can be shuffled to make room for this player in another position. Typically, the forwards among the substitutes will have lower numbers than the backs. There are no personal squad numbers and a versatile player's position and number may change from one game to the next. Players can also change positions during the match; common examples are the fly-half playing the full-back's position in defence or a prop taking the hooker's position at line-outs.

Different positions on the field suit certain skill sets and body types, generally leading to players specialising in a limited number of positions. Each position has certain roles to play on the field, although most have been established through convention rather than law. During general play, as long as they are not offside, the players may be positioned anywhere on the field. It is during the set pieces (scrum and line-out) that the positions are enforced.

History

During early rugby union games there were only really two positions; most players were in the forwards, who formed part of the scrimmage (which later was called "scrummage" and then "scrum"), and a few defensive "tends" (from "goaltenders").

Eventually, the attacking possibilities of playing close behind the scrimmage were recognised. The players who stationed themselves between the forwards and tends became known as "half-tends". Later, it was observed that the players outside scrimmage were not limited to a defensive role, so the tends and half-tends were renamed "backs" and "half-backs". As the game became more sophisticated, the backs positioned at different depths behind the forwards. They were further differentiated into half-backs, three-quarter-backs, and full-back. Specialised roles for the scrum also evolved with "wing-forward" (modern day flankers) being employed to protect the half-back.

The first international between England and Scotland was played in 1871 and consisted of 20 players on each side: thirteen forwards, three half-backs, one three-quarter and three full-backs. The player numbers were reduced to fifteen in 1877. Numbers were added to the backs of players' jerseys in the 1920s, initially as a way for coaches and selectors to rate individual players.

Names of positions

The various positions have changed names over time and many are known by different names in different countries. Players in the flanker positions were originally known as "wing forwards", while in the backs, "centre three-quarter" and "wing three-quarter" were used to describe the outside centre and wing respectively (although the terms are still sometimes used in the Northern Hemisphere) The names used by World Rugby tend to reflect Northern Hemisphere usage although fly-half is still often known as "outside-half" or "stand-off" in Britain, and "outhalf" in Ireland. In New Zealand, the scrum-half is still referred to as the "half-back", the fly-half is referred to as the "first five-eighth", the inside centre is called the "second five-eighth" and the outside centre is simply known as "centre". In America and Canada the number 8 is known as "8-man".

Collective terms are also used to describe similar positions, with the props and hookers combining to form the "front row", the locks the "second row" and the flankers and number 8 the "back row", "loose forwards" or the "loosies". The front row and second row combined are collectively termed the "tight five". In the backs, "half-backs" can be used to describe the scrum-half and fly-half; "inside backs" to describe the scrum-half, fly-half and inside centre; "midfield" for the fly-half and both centres (in New Zealand it refers only to the second five-eighth and centre); and "outside backs" for the outside centre, wings and full-back. The two props are distinguished by being either a "tighthead" (their head is positioned between the opposition prop and hooker) or "loosehead" (their head is positioned on the outside of the scrum). The "blindside flanker" binds to the scrum on the side closest to the side line, while the "openside flanker" binds on the side with the most space between the scrum and the sideline.

Backs

Full-back

Full-backs usually position themselves several metres behind the back line. They field any deep opposition kicks and are often the last line of defence should an opponent break through the back line. On attack, they can enter the back line, usually near the centres or wings, with the aim of providing an extra person and overlapping the defending players. Three of the most important attributes of a good full-back are good catching ability under a high kick, the ability to punt the ball a long distance with accuracy, and the speed and skill to join in back line attacking moves, especially counter-attacks. The full-back is the player most likely to field the high ball or "up and unders" kicked by the opposition. Good hands are needed to ensure the ball is caught cleanly to deny the opposition the chance to regain possession. As the full-back will inevitably catch the ball deep in their own territory with little support from their own players, they should either kick the ball downfield or run forward to link up with their backs to start a counter-attack. If the full-back kicks the ball out, the opposition have the line-out, whereas if they start a counter-attack they have a number of options.

To provide effective cover behind the defensive line, good full-backs are careful not to get caught out of position and must anticipate the opposition's play. Their position behind the backline allows them to see any holes in the defensive line and they either communicate with the backs to close the gaps up or cover the gaps themselves. The full-back has the most potential for attacking the opposition, especially from a misdirected kick. If a kick is fielded and there is enough space and support, the full-back may decide to counter-attack by running the ball back towards the opposition. Due to their kicking skills, in some teams the full-back is also responsible for taking the goal kicks.

For much of the history of the sport, the full-back position was almost totally defensive. Originally, the ball could be kicked directly into touch from any spot on the field, with a line-out then following at the spot where the ball went into touch. This effectively placed a premium on full-backs' skills in kicking from hand. The first Test tries by full-backs in international matches came relatively early, in 1878 and 1880, but it was not until 1934 that a full-back scored a try in the competition now known as the Six Nations Championship. Only three tries had been scored by full-backs in the Championship prior to 1969. According to rugby historian John Griffiths, the worldwide adoption of the current law restricting direct kicking into touch in September 1968 (a law previously used in Australia) "revolutionised full-back play". JPR Williams of Wales was the first full-back to regularly score tries after the law change, scoring six times in Five Nations matches in the 1970s.

Notable full-backs include Serge Blanco, who scored 38 tries in 93 tests for France and was known for his counter-attacking ability. In 1997, he was among the inaugural set of rugby players inducted into the International Rugby Hall of Fame and in 2011 he was also inducted into the IRB Hall of Fame. Four full-backs who played for the British and Irish Lions are in the International Rugby Hall of Fame; Gavin Hastings (also inducted into the IRB Hall in 2013) and Andy Irvine from Scotland, Tom Kiernan from Ireland and the aforementioned Williams. Hastings and Irvine were accurate goal-kickers and Kiernan is credited with being the first attacking full-back in Irish rugby. Williams was chosen as the greatest Lions full-back at the inaugural Lions Legends Dinner at Lord's in 2008 and is praised for his safety under the high ball, tackling and calm decision making. The other full-backs in the International Rugby Hall of Fame are Don Clarke and George Nēpia from New Zealand. Clarke, nicknamed "the boot", was an accurate goal kicker and Nēpia was noted for his tackling and kicking ability.

Three-quarters

Wing

The wings are generally positioned on the outside of the backline with the number 11 on the left and the number 14 on the right. Their primary function is to finish off moves and score tries. Wingers are usually the fastest players in the team and are either elusive runners or, more recently, big, strong and able to break tackles. The skills needed for the left wing and right wing are similar, although left-footed players are usually played on the left wing as they can step and kick better off their left foot. The winger on the blindside often "comes off the wing" to provide an extra man in the midfield, in the same vein as a full-back. One or both wingers will usually drop back on opposition kicks to give the full-back extra options for counter-attacking.

There are a number of notable wings throughout history. David Campese, a member of both the International and IRB Halls of Fame, played 101 times for Australia and held the world record for most tries in test matches. He was famous for his goose step and reverse pass. Welsh international Gerald Davies was influential in helping the British Lions become the only Lions touring party to win a Test series in New Zealand. Ieuan Evans played 72 games for Wales and scored 33 tries – at that time a record for Wales. In 1994, International Rugby Hall of Famer John Kirwan retired as the (then) most capped player and highest try scorer in All Black history,

Tony O'Reilly played wing for Ireland between 1955 and 1970 and scored a record 38 tries on two Lions tours. André Boniface is a French international that is a member of both the International Rugby Hall of Fame and the IRB Hall of Fame. Also in the IRB Hall of Fame is Bill Maclagan, a 19th-century player for Scotland and the Lions, who played at three-quarters, which eventually evolved into the modern position of wing. Another 2011 inductee in the IRB Hall is Brian Lima of Samoa, who played most of his career on the wing but ended it as a centre. He participated in five World Cups for Manu Samoa and became known as "The Chiropractor" for his ferocious tackling.

In 2012 Demi Sakata, a Japan star, who was considered one of the world's top players of the 1960s, became his country's first inductee into the IRB Hall.

Jonah Lomu entered the International Hall in 2007 and the IRB Hall of Fame in 2011, debuted as the youngest ever All Black.

Centre

There are two centres in a rugby team, inside centre (number 12) and outside centre (number 13). The inside centre usually stands close to the fly-half or at first receiver on the other side of the scrum or breakdown. Like the fly-half, they generally possess a good kicking game and are good at reading the play and directing the attack. The outside centre is positioned outside the inside centre and is generally the faster of the two. The centres' main role is to provide space for the players outside them. They need to run good lines (run into spaces or at 90 degrees to their opposition), be able to side step and swerve, and have good passing skills. When the ball is moved along the opposition backline, the centres are the first players to make the tackle. They need to be aggressive tacklers to knock their opponent down and seize the ball and be good at organising the defensive lines. Outside centres generally have more room to move than inside centres. Centres also provide support at the breakdowns and can run as decoys to confuse the defence.

Brian O'Driscoll is the fourth most-capped player in rugby union history, having played 141 test matches, 133 for Ireland (83 as captain), and 8 for the British and Irish Lions. He is the 8th-highest try scorer in international rugby union history, and the highest scoring centre of all time. Danie Gerber played centre for South Africa during the apartheid era and even though he was only able to play 24 tests over 12 years, he scored 19 tries. Mike Gibson played for Ireland and the Lions; his record of 69 caps for Ireland lasted for 26 years. Tim Horan won two World Cups for Australia, being named the Player of the Tournament in 1999. As a player, Ian McGeechan won 32 caps for Scotland and went on two Lions tours, while as a coach he led the Lions a record four times. Welsh centre Gwyn Nicholls played from 1896 to 1906 and was known as the "Prince of Threequarters". Other centres in the International Rugby Hall of Fame are Jo Maso and Philippe Sella from France, known for their flamboyant attacking play. Gibson and Sella are also in the IRB Hall of Fame. Seven centres are in the IRB Hall but not the International Hall— Frank Hancock, a 19th-century Welsh player whose skills led to the creation of the modern two-centre formation; Guy Boniface, French international and younger brother of André; brothers Donald and Ian Campbell of Chile; Zimbabwe international Richard Tsimba; and Bleddyn Williams and Jack Matthews, who formed a legendary centre partnership for Cardiff and Wales in the era immediately following World War II.

Half-backs

Fly-half

A fly-half is crucial to a team's game plan; they possess leadership and order the back line. They are usually the first to receive the ball from the scrum-half following a breakdown, line-out or scrum and need to be decisive with what actions to take and be effective at communicating with the outside backs. Good fly-halves are calm, clear thinking and have the vision to direct effective attacking plays. Fly-halves need good passing and kicking skills. Often the fly-half is the best kicker in the team and needs to be able to execute attacking kicks such as up-and-unders, grubbers and chip kicks as well as being able to kick for territory. Many fly-halves are also the team's goal kickers.

Fly-halves in the International Rugby Hall of Fame include Cliff Morgan, as well as fellow Welshman Phil Bennett, the latter of whom unleashed two great sidesteps to set up what some have described as " the greatest try of all time". South African Naas Botha scored 312 points (including a record 17 drop goals) despite playing most of his career when the Springboks were boycotted. Australia's Mark Ella used his vision, passing skills and game management to orchestrate a new flat-back attacking style. Grant Fox was one of the most respected goal-kickers who scored more than 1,000 points in all matches for New Zealand. Barry John was known simply as "the king" to Welsh rugby fans and was rated third in the 1971 BBC Sports Personality of the Year Award. Jack Kyle is widely considered Ireland's greatest player. Michael Lynagh took over fly-half from Ella and in his first test in that position scored an Australian record of 23 points against Canada. Bennie Osler played for South Africa from 1924 until 1933, during which he played a South African record of 17 consecutive games and scored a then world record of 14 points in one game against New Zealand. Hugo Porta is regarded as one of the finest players that Argentina has produced and has been a member of the Laureus World Sports Academy since 2000.

Of the players mentioned above, Ella, Kyle, Morgan, Osler and Porta are members of the IRB Hall of Fame. Four fly-halves are in the IRB Hall but not the International Hall. Gareth Rees of Canada played in all of the first four Rugby World Cups, and remains the country's all-time leading Test points scorer. Kennedy Tsimba of Zimbabwe, younger brother of the aforementioned Richard, only played four times for his country, but was one of the world's top fly-halves in the early 21st century, twice being named the player of the year in South Africa's domestic Currie Cup. He was also the first black player to captain the Zimbabwe national team. Thomas Lawton, Snr, an Australian inducted in 2013, was one of the leading fly-halves of the 1920s and early 1930s.

Scrum-half

The scrum-half is the link between the forwards and the backs. They receive the ball from the line-out and remove the ball from the back of the scrum, usually passing it to the fly-half. They also feed the scrum. Along with the fly-half, they make many of the tactical decisions on the f