In 1999, Quirós joined Alajuelense and he moved abroad for a spell with Venezuelan side Trujillanos. In summer 2002 he signed for Santos de Guápiles but a serious knee injury hampered his career with the club, finally leaving them after two years of misery for Carmelita. Quirós made his debut for Costa Rica in a September 1993 friendly match against Saudi Arabia and earned a total of 7 caps, scoring no goals.
Nicknamed Chimi, he made his debut in the Costa Rican Primera División in 1993 playing with hometown club Cartaginés and he soon become part of the usuals at the starting line-up and one of the most claimed players. He represented his country in 1 Fédération internationale de football association World Cup qualification match He also played at the 1997 UNCAF Nations Cup, taking the place of an injured Sandro Alfaro. His final international was a November 1997 Fédération internationale de football association World Cup qualification match against Canada.
