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Benjamín Urdapilleta (born March 11, 1986 in Buenos Aires) is an Argentine rugby union footballer and Castres player . He has played in both the centre and the flyhalf positions. His test debut for Argentina was in 2008 when he played against South Africa in Johannesburg. He signed for the Harlequins in March 2010. During the 2016–17 season he played for Castres Olympique. In the final of the 2017–18 Top 14 season he converted two tries and scored five penalties as Castres defeated Montpellier.