Flanker (rugby union)

Flanker is a position in the sport of rugby union. Each team of 15 players includes two flankers, who play in the forwards, and are generally classified as either blindside or openside flankers, numbers 6 and 7 respectively. The name comes from their position in a scrum in which they 'flank' each set of forwards. They fight for the ball– most commonly in rucks and mauls. Flankers also assist in pushing in a scrum, but are expected to detach from the scrum as early as possible in order to get to the play before the opposition's forwards. Flankers also participate in line-outs, either being lifted to contest or win possession, or to lift other players. Flankers are usually the key participants in the tackling process. The flankers, especially the open side is often the fastest forward on the team but still relied upon for tackling.

Flankers can be known by several different names. Historically, they were often called wing-forwards, although this name had a more specific meaning in New Zealand when they used a now-archaic scrum formation. This term is rarely used any more, but the terms breakaway, flank, and flank forward are sometimes used. Collectively, the flankers and the number eight can also be known as the back-row forwards – referring to their scrum positions – or as loose forwards because they are loosely bound to the scrum.

Flankers are the players with the fewest set responsibilities and therefore the position where the player should have all-round attributes: speed, strength, fitness, tackling and handling skills. Flankers are always involved in the game, as they are the players most commonly involved in winning the ball in open play, especially the openside flanker. Blindside flankers tend to be bigger, but not as fast as their partners on the openside.

In open play, flankers will often stand behind the backs, supporting them. If any ball is dropped by the backs, the flankers' job is to clear up messy ball and start a new phase of play. Because they are always close to the ball, they are often first to the breakdown.

...
Wikipedia