Target man Pezzarossi, nicknamed El Tanque ("the Tank", due to his size), started his footballing career with Guatemalan lower division club Deportivo Escuintla.

[4] During the 2011 Copa América break, it was reported that Pezzarossi would join to Chilean Primera División side Deportes La Serena in a season deal.

He debuted for La Serena in a 3–0 away loss against Universidad de Chile, playing only 23 minutes in the game after of replace to his teammate Juan Sánchez Sotelo.

The following match, Pezzarossi scored in the 2–0 win of La Serena to Universidad de Concepción in the 88th minute, after an impressive header.

His good performance in La Serena made that Pezzarossi was recalled to the national team for the 2014 FIFA World Cup qualification match against Saint Vincent and the Grenadines, in where he scored in a 3–0 win of his country.