Career
Product of youth set-up, Fuenzalida was promoted to first-adult team in 2004 aged 19. He debuted in a 4–0 defeat with Unión Española at San Carlos de Apoquindo for a league game, during a moment considered as one of the club"s biggest sports crisis. During the winter of 2007, Fuenzalida aged twenty-two decided to take a break as football player to study comercial engineering at Pontifical Catholic University of.
After six month studying, he returned to professional football and joined rivals on a four-year deal.
In June he joined O"Higgins on loan after an unsuccessful tournament where only scored one goal in seven games. In December 2009, it was reported that Fuenzalida finished his loan spell at O"Higgins and would return to to face the next season.
On 29 July 2014, Fuenzalida reached a one-and-half year with Argentine powerhouse. Following an unsuccessful spell at Boca, he returned to, signing for Las Condes-based club as a free agent.
Fuenzalida has played in the U-20 and U-23 levels of the an national team in the 2005 Fédération internationale de football association U-20 World Cup and the 2008 Toulon Tournament respectively.
In 2015, after being disaffected of the 30-man provisional list for the Copa America, he was re-considered by Sampaoli in the definitive list following Carlos Carmona withdraw for injury. International goals Club International Individual.