Half-back

a position employed in a 2
Found on http://en.wikipedia.org/wiki/Glossary_of_association_football_terms

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Half-back

the back wearing No.9 who normally feeds the ball into a scrum and retrieves the ball at the base of scrums, rucks, and mauls. Can also be called the Scrum-half.
Found on http://www.espnscrum.com/scrum/rugby/page/97263.html

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