Óscar Antonio Ramírez Hernández (born 8 December 1964), is a former Costa Rican footballer who played as a midfielder, and the current manager of the Costa Rica national team.
During the first half of the 2010s, he managed Alajuelense in two separate stints. Regarded as the most successful manager in the club's history, he won five league titles. Shortly after his second departure, he was appointed as the head coach of the Costa Rican national team.
He played for the two teams in his country, Alajuelense and Saprissa, becoming a star and an idol for both teams' fans. He made his debut for Liga on 13 November 1983 against Ramonense and scored his first goal a week later against Municipal San José. With Alajuelense he won four national championships during the 1980s and early 1990s, as well as a CONCACAF Champions Cup in 1986.
During 1993's season, El Machillo switched to Alajuela's arch-rival team Saprissa, causing a commotion on Liga's fans. With Saprissa, he won a total of three more national championships and two CONCACAF Champions Cup titles. In 1995 he moved to hometown club Belén but returned to Saprissa in 1997.
He retired in March 2000 when at second division Guanacasteca.
Ramírez made his debut for Costa Rica in a February 1985 friendly match against El Salvador and earned a total of 75 caps, scoring 6 goals. He represented his country in 21 FIFA World Cup qualification matches and played at the 1990 FIFA World Cup held in Italy. He also played at the 1991 and 1997 UNCAF Nations Cups as well as at the 1991 CONCACAF Gold Cup and the 1997 Copa América in Bolivia.
He collected his final cap in an August 1997 World Cup qualifier against El Salvador.
- Scores and results list Costa Rica's goal tally first.
|1.||26 May 1985||Estadio Alejandro Morera Soto, Alajuela, Costa Rica||United States||1–0||1–1||1986 FIFA World Cup qualification|
|2.||18 July 1985||Estadio Ricardo Saprissa Aymá, San José, Costa Rica||Trinidad and Tobago||3–1||Friendly match|
|3.||23 August 1992||Estadio Nacional de la Sabana, San José, Costa Rica||Panama||2–0||5–1||1994 FIFA World Cup qualification|
|4.||18 April 1997||Estadio Mateo Flores, Guatemala City, Guatemala||Nicaragua||2–0||5–1||1997 UNCAF Nations Cup|
|5.||18 April 1997||Estadio Mateo Flores, Guatemala City, Guatemala||Nicaragua||3–0||5–1||1997 UNCAF Nations Cup|
|6.||18 April 1997||Estadio Mateo Flores, Guatemala City, Guatemala||Nicaragua||5–0||5–1||1997 UNCAF Nations Cup|
After his retirement, Ramírez began working as Hernán Medford's assistant coach in Saprissa, winning in less than three years, a national championship, a UNCAF Cup title, and a CONCACAF Champions Cup title, thus earning a berth at the FIFA Club World Championship Toyota Cup.
As of October 28, 2006, the Costa Rican Football Federation announced that Medford and his coaching staff would take charge of the Costa Rica national football team. Thus making him the new assistant coach for the Costa Rica national football team.
In May 2010, Ramírez took charge of Alajuelense, assisted by his former World Cup teammate Mauricio Montero. He was voted Costa Rican manager of the year 2012, but resigned in January 2013 only to return at the helm in May 2013.
On August 2015, Ramírez was appointed as Paulo Wanchope's assistant coach for the Costa Rica national team. However, a week after his appointment, Wanchope was involved in a fight in Panama and announced his departure from the national team. Ramírez was then appointed as head coach a week after.
Ramírez is married to Jeannette Delgado and they have four children.