Guillermo Martínez López (born 28 June 1981 in Camagüey) is a Cuban javelin thrower.

In intercontinental competitions, he finished tenth at the 2005 World Championships and ninth at the 2007 World Championships.

[1] He also won the gold medal at the 2006 Central American and Caribbean Games[2] and the gold medal at the 2007 Pan American Games His personal best throw is 87.20 metres, achieved in October 2011 in Guadalajara.

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