1954–1970: Beginnings The club was founded on 15 April 1955. It was following the merger between five local clubs: Tifón, Minas Navío, Cóndor, Cemento Melón and Calera Comercio. Nevertheless, the club's foundation was recorded on 26 January 1954.
2011–2016: Primera División de Chile The successful 2011 season 2011 Torneo Apertura Unión La Calera began the
2011 season hiring eight players:
Jonathan Domínguez (forward from
Unión San Felipe), Rodrigo Flores (goalkeeper from
O'Higgins), In this match the scores were from Paraguayan striker
Ever Cantero for
Santiago Morning and an
own-goal from
Edgardo Abdala. The next week on 6 February, the Uruguayan Braian Rodríguez (the striker from San Martín de Porres) scored Calera's first goal in top-tier in a 1–0 home win over
Unión San Felipe. The goals for Calera were scored by the defender Claudio Muñoz in the 39th minute and a 3–1 victory against
Audax Italiano). Nevertheless, on 19 February, now Calera's short unbeaten was broken by
Cobresal which defeat 3–1 the team in
El Salvador with a hat-trick of
Joel Soto. This victory meant the team's climb to the league table's first place, being there with thirteen points next to Universidad Católica. On 11 March, Unión La Calera had to play with giants
Colo-Colo at the
Estadio Monumental in the capital city of
Santiago. However, the team was defeated in a 2–0 loss with goals of the Argentinian
Lucas Wilchez and Chilean international
José Pedro Fuenzalida. The next matchday, on 20 March, Unión La Calera defeated 3–1 as local to
Audax Italiano, thereby confirming its second place behind Universidad Católica. The team began losing with a goal of
Bryan Carrasco in the 20th minute, but the score of Braian Rodríguez through a penalty, gave encouragement so that later
Octavio Pozo and
Jorge Ampuero contribute with goals. the team went into a losing streak until the end of the regular phase which finished in the seventeenth week. Since there, Unión La Calera draw then with
Palestino (with a goal of Braian Rodríguez in 90th minute), lost with
Universidad de Chile by a 2–0 score, again 2–0 with
O'Higgins the next week (13th) and in the 15th matchday (after a 0–0 draw
Huachipato in the 14th week) lost 1–0 to Deportes Iquique with a score of defender
Juan González Calderón. Only a 2–0 win over
Ñublense with a twice of Braian Rodríguez in the 16th matchday, and a 1–1 away draw with
Santiago Wanderers in regular phase's final matchday, secured the team's classification to the playoffs (the qualified were eight teams out of a total of eighteen).
League table Playoffs Background and Results The favorite to win the championship was
Universidad Católica which finished in the regular phase's first place. Nevertheless, Católica (after winning to Unión La Calera in the semi-finals) lost to
Universidad de Chile in the final's second leg, where Universidad de Chile won 4–1, reversing the first leg's 0–2. For its part, Unión La Calera already without the surprise sensation which generated in the tournament's early part, defeated to
Unión Española in the quarterfinals for then repeat a 2–1 triumph over Católica in the semifinals first leg. Unfortunately, in the next leg, the team was eliminated after losing 1–0 in
Santiago.
Quarterfinals: Calera vs. Unión Española ;First leg On 26 May, Unión La Calera and Unión Española played the quarterfinal's first leg at
Estadio Municipal Nicolás Chahuán Nazar and the team recovered from its 3–1 loss in the regular phase. The game's only one goal was scored by
Ángel Carreño in the 68th minute. The match had 2,459 spectators. The match had 4,842 spectators. For its part, Unión with Sierra also repeated the 4–2–1–3 lineup, whilst Católica, coached by
Juan Antonio Pizzi, played with a 4–2–2–2 lineup: the defenders were
Enzo Roco (then Enzo Andía) as left sweeper, Hans Martínez as centre back and Alfonso Parot as right sweeper; as central midfielders were
Jorge Ormeño and
Francisco Silva; the attacking midfielders were Fernando Meneses (left midfielder),
Marcelo Cañete (playmaker) and
Felipe Gutiérrez; whilst the forwards were
Roberto Gutiérrez and
Lucas Pratto. Astorga for its part, remained the same lineup, again with the same players. The game's only one goal was scored by Enzo Andía in the beginnings of the second half (46th minute). This goal, frustrated Calera's chances to qualify to the final. In that way, thereby was how Calera concluded its first great campaign in Chilean top-level. == Emblem ==