Roc Oliva Isern (born 18 July 1989), also known as "Metra", is a Spanish former field hockey player who played as a midfielder or forward for the Spanish national team.

His father Jordi and sister Georgina are also both Olympic hockey players.

[4] Oliva was a member of the Spanish National Team that claimed the silver medal at the 2008 Summer Olympics in Beijing, PR China.

In October 2019, he was brought back into the national team for the 2019 Men's FIH Olympic Qualifiers.

This biographical article relating to a Spanish field hockey figure is a stub.