Nicknamed "El Conejo" (The Rabbit) or "El Diente" (The Tooth), López started his playing career with Montevideo Wanderers, but was originally rejected after he was deemed not to be physically strong enough to play professionally.
Me pseudonimin "El Conejo" (Lepuri) ose El Diente" (Dhëmbëshi), López filloi karrierën e tij futbollistike me Montevideo Wanderers, por u refuzua nga klubi pasi ai nuk konsiderohej i fortë fizikisht për të luajtur futboll profesionstë.