The color that identifies the club is red (present in their uniform since the formation as Union La Calera) and disputes their home games at the Estadio Municipal Nicolás Chahuán Nazar.

Nevertheless, due to its reconstruction, around 2017 and 2018 they moved to Estadio Municipal Lucio Fariña Fernández in neighboring Quillota (which has a capacity for 7703 spectators).

On 12 February, for the third week, they surprised everyone after beating 2–1 to Universidad Católica as local in Estadio Municipal Nicolás Chahuán Nazar.

[5] Thereby, Unión La Calera broke the small unbeaten Universidad Católica had in the first two games[5] (a 0–2 away win over Deportes Iquique[6] and a 3–1 victory against Audax Italiano).

[7] Nevertheless, on 19 February, now Calera's short unbeaten was broken by Cobresal which defeat 3–1 the team in El Salvador[8] with a hat-trick of Joel Soto.

[9] The following week the team was recovered from the 3–1 defeat with Cobresal, beating 2–0 to Deportes La Serena at Nicolás Chahuán Nazar, but after this victory, an important triumph was against Cobreloa in Calama with a goal of Ramón Fernández in the 17th minute.

[11] 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.

[12] 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.

Since there, Unión La Calera draw then with Palestino (with a goal of Braian Rodríguez in 90th minute),[16] lost with Universidad de Chile by a 2–0 score,[17] again 2–0 with O'Higgins the next week (13th)[18] and in the 15th matchday (after a 0–0 draw Huachipato in the 14th week[19]) lost 1–0 to Deportes Iquique with a score of defender Juan González Calderón.

[30] For its part, Unión with Sierra also repeated the 4–2–1–3 lineup,[30] being the only one change Leonardo Monje (who scored against Calera in the team's 3–1 defeat as visitors in Santa Laura for the regular phase) instead of Mario Aravena.

Astorga played with the same lineup that occupied against Unión Española in the quarterfinal's second leg,[31] whilst Católica, coached by Juan Antonio Pizzi, played with a 4–2–2–2 lineup:[31] Christopher Toselli in the goal;[31] David Henríquez and Alfonso Parot as central backs;[31] Rodrigo Valenzuela and Juan Eluchans as full backs;[31] Gonzalo Sepúlveda and Tomás Costa as central midfielders;[31] Fernando Meneses and Milovan Mirosevic as right and left midfielders;[31] and finally Pablo Calandria and Francisco Pizarro as forwards.

They just had to draw in Estadio San Carlos de Apoquindo or win by one goal there, in Chile's capital city Santiago.

For this match, Pizzi changed Católica's lineup to face Calera, this time he remained Toselli in the goal, but played with a 3–2–3–2 lineup (similar to Astorga's 3–4–1–2 lineup):[32] the defenders were Enzo Roco (then Enzo Andía) as left sweeper,[32] Hans Martínez as centre back[32] and Alfonso Parot as right sweeper;[32] as central midfielders were Jorge Ormeño and Francisco Silva;[32] the attacking midfielders were Fernando Meneses (left midfielder), Marcelo Cañete (playmaker) and Felipe Gutiérrez;[32] whilst the forwards were Roberto Gutiérrez and Lucas Pratto.

This change was resisted by the fans, who held demonstrations in La Calera, and started a campaign on social networks to restore the historic shield.

Current squad of Unión La Calera as of 7 December 2024 (edit) Sources: ANFP Official Web Site Manager: Walter Lemma Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.