|Full name||Wilmer López Arguedas|
|Date of birth||3 August 1971|
|Place of birth||Alajuela, Costa Rica|
|Height||1.69 m (5 ft 6 1⁄2 in)|
|* Senior club appearances and goals counted for the domestic league only.
He played for Alajuelense and is one of the club's biggest idols of all time.
López made his debut in the Costa Rican Primera División on 5 January 1992 playing with Carmelita against ASODELI also scoring his first league goal in that match. The following next season, he was bought by Alajuelense, becoming one of the most beloved players and a crowd favorite, playing 13 seasons and winning 7 Costa Rican Championships, 3 Copa Interclubes UNCAF championships and 1 CONCACAF Champions' Cup, being part of the team that won 4 national championships in a row (1999–2000–2002–2003). He was named the best player of the national tournament for two seasons in a row before moving to Deportes Tolima in Colombia, whom he left very soon due to contractual problems, and again during another season, when he returned to Costa Rica. He also played the Copa Merconorte and the Copa Sudamericana.
Nicknamed El Pato (The Duck), the midfielder also played for Pérez Zeledón. He is also known as El Ingeniero (The Engineer) due to his amazing ability to create plays with short and long passes and also for his fast thinking that made him one of the best midfielders in the region during the '90s and the early 2000s. After 2003, he suffered multiple injuries that made him lose a lot of games and he never regained his earlier abilities as a player, although he was still loved by the crowd and gave a few good games along the road to the end of the 2007 season when his contract expired and the team decided not to hire him again. It was a very sad day for all the Alajuelense's fans. Every time Pérez Zeledón played at the Alejandro Morera Soto stadium, his former fans waited for him singing and clapping every time he touched the ball, letting him know he still was in their hearts. López totalled 478 league matches and 80 goals for Liga. He also played 92 international club games for them. He played 550 league games in total.
López made his debut for Costa Rica in an August 1995 friendly match against Japan and earned a total of 76 caps, scoring 6 goals. He represented his country in 22 FIFA World Cup qualification matches and played in all 3 games during the 2002 FIFA World Cup held in Korea and Japan. He also played at the 1995 and 1997 UNCAF Nations Cups as well as at the 1998, 2000, 2002 and 2003 CONCACAF Gold Cups and the 1997 Copa América. He also was a non-playing squad member at the 2001 Copa América.
- Scores and results list Costa Rica's goal tally first.
|1.||1 December 1996||Estadio Ricardo Saprissa Aymá, San José, Costa Rica||United States||2–0||2–1||1998 FIFA World Cup qualification|
|2.||23 April 1997||Estadio Mateo Flores, Guatemala City, Guatemala||Honduras||3–0||4–0||1997 UNCAF Nations Cup|
|3.||28 January 1998||Estadio Alejandro Morera Soto, Alajuela, Costa Rica||Trinidad and Tobago||4–0||4–0||Friendly match|
|4.||4 February 1998||LA Memorial Coliseum, Los Angeles, United States||Cuba||3–0||7–2||1998 CONCACAF Gold Cup|
|5.||4 February 1998||LA Memorial Coliseum, Los Angeles, United States||Cuba||5–0||7–2||1998 CONCACAF Gold Cup|
|6.||26 January 2000||Estadio Ricardo Saprissa Aymá, San José, Costa Rica||Trinidad and Tobago||1–1||2–1||Friendly match|
On Wednesday 22 July 2009, López played his retirement match with Alajuelense against a team of friends that he picked himself. He played the first half with his friends and the second half with Alajuelense to finish the match defending the colors that he loves.
"El Pato" was one of the most loved players in Alajuelense, along with his devotion to "La 12", the official group of Fans. They became more notorious on the day of his retirement, when all the fans jumped into the field to carry him on their shoulders for almost an hour.
López is married to Alejandra López and the couple has two sons and a daughter.
- Trayectoria de Wílmer López - Nación (Spanish)
- Regalo para Pato López - Nación (Spanish)
- Wílmer en penumbras Aún no logra finiquitar su situación con el Tolima - Nación (Spanish)
- Wílmer López listo Ayer llegó su pase internacional, procedente de Colombia - Nación (Spanish)
- Restrepo avala a Wílmer López - Nación (Spanish)
- Un histórico "Pato" - UNAFUT (Spanish)
- Cordero, tico con más juegos internacionales de clubes - Nación (Spanish)
- Marvin Obando es el que disputó más partidos en Primera División - Nación (Spanish)
- Appearances for Costa Rica National Team - RSSSF
- Wílmer López – FIFA competition record
- UNCAF Tournament 1995 - RSSSF
- UNCAF Tournament 1997 - RSSSF
- CONCACAF Championship, Gold Cup 1998 - Full Details - RSSSF
- CONCACAF Championship, Gold Cup 2000 - Full Details - RSSSF
- CONCACAF Championship, Gold Cup 2002 - Full Details - RSSSF
- CONCACAF Championship, Gold Cup 2003 - Full Details - RSSSF
- Copa América 1997 - RSSSF
- Copa América 2001 - RSSSF
- Se retira Wílmer López Los liguistas despiden al dueño de la número ‘6’ - Nación (Spanish)
- Campamento tico En familia - Nación (Spanish)
- Wílmer López at National-Football-Teams.com
- Perfil de jugadores de la Selección Nacional Wílmer López - Nación (Spanish)