Héctor Mancilla

Born in Purranque, Mancilla played amateur football for Club Deportivo Santiago Morning de Purranque in his birthtown, and in 1999, aged 18, he left his home city, moving to Malleco, joining Malleco Unido in the Chilean Tercera División. In his debut season for Malleco in 1999, Mancilla played against Huachipato's reserve team, who also competed in the third tier, and would be scouted by them, joining Huachipato's reserve side that same year. Mancilla would be promoted to Huachipato's main squad the following season. Mancilla barely played during his debut season for Huachipato in the top flight, only making 3 appearances without scoring, in a very poor season for Huachipato, with the club avoiding relegation to the second tier by one point, by virtue of a draw in the last game of the season. He would feature more frequently in 2001, under new manager Oscar Garré, making 10 appearances, netting the first professional goal of his career by opening the scoring for Huachipato in a 4–2 away defeat against eventual champions Santiago Wanderers, and scoring for the second and last time that season, netting the equalizing goal in a 2–2 home draw against Coquimbo Unido. Huachipato would finish the season in seventh place, qualifying for the 2001 Liguilla Pre-Copa Libertadores, where Mancilla would play in both legs of the post season qualifiers for the 2001 Copa Libertadores, going scoreless as Huachipato lost 2–6 in aggregate to Cobreloa. In 2002, which changed the tournament…

Mancilla was first called up to the Chile national football team in 2004, being named into Chile's Copa America 2004 squad, where he made his international debut in the same competition as a substitute during a 1–0 group stage loss to Brazil, he would play the remainder of Chile's group stage matches, as a half time substitute in a 1–1 with Paraguay and as a starter in the 1–2 defeat to Costa Rica which eliminated Chile from the competition. Mancilla would not be called up again until 2009, where he would feature as a substitute in a 2–0 away win against Paraguay on 6 June 2009 and a 4–0 home win against Bolivia on 10 June 2009 for the 2010 World Cup Qualifiers. Mancila would make 5 friendly match appearances during 2009 and 2010, but would not be considered for Chile's 2010 FIFA World Cup squad, leading to his international retirement in 2010. He would end up finishing his international career in 2011, starting in a 2–0 friendly win against Colombia.

Nickanamed Mancigol, Mancilla was a prolific striker, described in his prime as a true threat in the box due to his finishing and ability in short spaces, in spite of being considered a physically unimposing striker. During his career, Mancilla was a regular top scorer both in Chile and in Mexico, but was rarely considered for his national side.

Mancilla started his career as manager of Escorpiones and Real Apodaca in the Liga Premier de México. On 8 October 2024, Mancilla joined the technical staff of Mario García in Morelia as an assistant coach. In August 2025 he was named head coach of Liga Premier de México team Avispones de Chilpancingo. After coaching Avispones de Chilpancingo, Mancilla assumed as manager of Real Refineros on 31 July 2026.