|Full name||Once Lobos Chalchuapa|
|Ground||Estadio Cesar Hernández
Chalchuapa, Santa Ana
|Chairman||Juan Duch Martínez|
|Manager||Cesar "el Piscuchita" Acevedo|
|League||Liga de Plata Salvadoreña|
|Apertura 2015||Apertura 2015 Grupo "A"|
They are the oldest club still active in any form of the El Salvador football league system.
Once Lobos was founded in 1922, in the historic city of Chalchuapa. They celebrated their first official match against UCA in 1923 and until recently played all of their home games within earshot of the magnificent Tazumal pyramid and its ancient "ball field" from Pre-Columbian times at the "Estadio el Progreso" where the famous tagline was "the grass never progresses". Since December 2002, their home pitch is the Estadio Cesar Hernández in the outskirts of the city. Their ascension to Primera División was achieved on February 7, 1980 at the Óscar Quiteño stadium in the neighboring city of Santa Ana, where they beat UCA in the second and decisive game.
In 1980, Once Lobos were promoted to the top division. Their struggle to fight-off relegation was made more difficult by the league's decision the previous year to remove 2 teams at season's end. Despite this, they finished 9th assuring themselves a spot in the Salvadoran top level of competition one more year. Dragón and Platense were the two clubs relegated that year.
In the 1981 Season, the Chalchuapa side won the "Torneo de Copa" beating the League Champion Atlético Marte by penalties. At the conclusion of the regulation time, the score was tied one all (Once Lobos scorer was W. Barrera at 27‘) and nothing changed in the ensuing 30 minute overtime.
The 1982 season saw the team come under the direction of Dr. Ricardo Mena Laguán. At the end of the regular season, the teams that made it onto the final Serires were Águila, Atlético Marte, Independiente and Once Lobos. In this elimination round, Atlético Marte defeated Once Lobos 2 nil in the first leg and drawing in the second leg. Once Lobos and Águila fought for 3rd and 4th place respectively in a single game played on December 19. Once Lobos emerged victorious by Penalties after the end of regulation the score read 3 all. Once Lobos capitalized on all 5 shots while Águila could only score 4. Thus achieving the best position for the "yuqueros" in their long history. To make this achievement more impressive, Once Lobos did it with only 10 men on the pitch since the 81st minute in regular time, when Mario D. Campos was sent off.
In their last season at the top level in this period, 1983, Once Lobos made it to the final round once again. Still under the direction of Ricardo Mena Laguán. Joined by Independiente, C.D. FAS and C.D. Águila fought the final in a two-round robin elimination; achieving 3rd place once again by defeating Independiente this time in the last game by a score of 2–1.
They were promoted to the Segunda División in 1995 and then ascended to the Primera División in 2004 through a "play-off" game between the 2nd place Segunda División (Once Lobos) and the penultimate place in Primera División (Chalatenango).LA BARRA OFICIAL SE LLAMA MANADA FEROZ
- Third Place (2): 1982, 1983
- 1980-81, 1996–97, 2014 Clausura
- Copa Champions Tourney: 1
Colours and crest
Throughout the club's history, Once Lobos have worn yellow with a blue strip.
- Estadio El Progreso; TBD (TBD–2002)
- Estadio Cesar Hernández; TBD (2004–2011)
- Estadio Chalchuapa ; TBD (2002–present) 
As of 2015:
Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
Squad Changes for Apertura 2015
- Cesar Larios – Transferred to Juventud Independiente
- Cristian Gil Mosquera – Transferred to C.D. Topiltzin
List of Coaches