Arzú began his professional career with Liga Nacional de Honduras side Platense in 2005. He has established himself as one of the top central defenders in Honduras. In February 2009, he went on trial to the Chinese side Beijing Guoan alongside his compatriot Hendry Córdova, but the club decided not to sign them.[1]
Arzú made his senior debut for Honduras in an October 2010 friendly match against Guatemala and has, as of July 2012, earned a total of 3 caps, scoring no goals.