Fullback (or full-back) is one of the positions in rugby league football. Wearing jersey number 1, the fullback is a member of the team's 'back-line' (1-7). The position's name comes from their duty of standing the furthest back in defence, behind the forwards (13-8), half backs (7 and 6) and three-quarter backs (5-2). Fullbacks are therefore the last line of defence, having to tackle any opposition players and regather the ball from any kicks that make it through their team-mates. It is for this reason that the fullback is also referred to as the sweeper or custodian. Fullback is also an important position in attack, handling the ball nearly every set of six and often running into open space on the field. Therefore, together with the two half backs and hooker, fullback is one of the four key positions that make up what is referred to as a team's 'spine'. Because the fullback makes the most support runs, players in the role complete more very high-intensity running than any other position.
The Rugby League International Federation's Laws of the Game state that the 'full back' is to be numbered 1. However, traditionally players' jersey numbers have varied, and in the modern Super League, each squad's players are assigned individual numbers regardless of position.
Notable fullbacks 
Fullbacks that feature in their respective nations' rugby league halls of fame are France's Puig Aubert, Australia's Clive Churchill and Charles Fraser, Wales' Jim Sullivan and New Zealand's Des White. Churchill's attacking flair as a player in the 1950s is credited with having changed the role of the fullback.
See also 
- Hickey, Julia (2006). Understanding Rugby League. UK: Coachwise. ISBN 1905540108, 9781905540105 Check
- news.bbc.co.uk. "Positions guide: Full-back". Rugby League: Laws & Equipment. BBC Sport. Retrieved 11 July 2012.
- Rob, Lancaster (6 October 2011). "Final battles". Sky Sports. Retrieved 16 July 2012.
- therfl.co.uk. "Understanding Positions". A Guide to the Game. Rugby Football League. Retrieved 24 June 2012.
- Hall, Sam (30 Nov, 2011). "Rejuvenated Denan Kemp puts hand up for custodian spot". Illawarra Mercury. Retrieved 11 July 2012.
- halifaxcourier.co.uk (15 August 2008). "Fax is Miles better for me: Greenwood". Halifax Courier. Retrieved 11 July 2012.
- Bryan, Andrew (29 June 2012). "Back yourself in Origin Dream Team". nswrl.com.au. Retrieved 11 July 2012.
- Read, Brent (11 February 2012). "Coach Tim Sheens yet to crack Wests Tigers' backbone". The Australian. Retrieved 11 July 2012.
- Sirotic AC, Knowles H, Catterick C, Coutts AJ. "Positional match demands of professional rugby league competition". PubMed. University of Technology, Sydney. Retrieved 12 July 2012.
- The International Laws of the Game and Notes of the Laws. RLIF. 2007. p. 9.
- Middleton, David (2008). League of Legends: 100 Years of Rugby League in Australia. National Museum of Australia. p. 31. ISBN 978-1-876944-64-3.
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