|Full name||Jonathan Guillermo Núñez Espinoza|
|Date of birth||25 October 1986|
|Place of birth||Talca, Chile|
|Height||1.68 m (5 ft 6 in)|
|Rangers de Talca|
|2004–2010||Rangers de Talca||38||(1)|
|2007||→ Palestino (loan)||29||(1)|
|2008||→ Curicó Unido (loan)||24||(0)|
|2013–2017||Deportes Puerto Montt||90||(3)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 8 November 2018|
He is nicknamed Mariachi in honor to his father.
In 2007, after the relegation of Rangers to Primera B, he remained at top-tier after being loaned to Palestino, scoring one goal in 29 appearances during all the season. The incoming year, he was loaned again, this time to Curicó Unido from the second-level, whilst Rangers achieved its promotion to the Campeonato Nacional.
In 2009, he finally played with Rangers at the top-level, but however the team lost the category of controversial way due to problems with Harold Mayne-Nicholls’s management at the ANFP following the mistake of team’s coach Oscar del Solar to put six foreigner players on the pitch against Cobreloa. He left the club in 2010.
Following spells at Magallanes (2011) and Santiago Morning (2012), Núñez joined Deportes Puerto Montt in January 2013. He helped the southern club to win the Segunda División Profesional during the 2013–14 season; title which allowed Puerto Montt to return to the second-tier after, precisely, that season of absence.
- Deportes Puerto Montt
- Segunda División Profesional: 2013–14
- "Fútbol Chileno: Los mejores apodos de futbolistas chilenos". chile.as.com. 13 August 2015. Retrieved 2 September 2016.
- "Tribunal sentencia el descenso de Rangers a Primera B". Diario Atacama. 12 December 2009. Retrieved 2 September 2016.