Career
Lonnis made his debut in the Costa Rica Premier Division for Cartaginés on 22 July 1990 against Herediano and also played for Carmelita. He however played the majority of his career for Deportivo Saprissa, where he reached local stardom, becoming one of the most emblematic figures for the fans, either as Saprissa"s or Costa Rica"s national squad goalkeeper. He totalled 362 games for the club
He made his debut for Costa Rica in a December 1992 Fédération internationale de football association World Cup qualification match against Street Vincent & the Grenadines and earned a total of 76 caps, scoring no goals.
He holds the record for the goalkeeper with the most appearances for the senior Costa Rica national football team He also played at the 1993, 1995, 1997, 1999 and 2001 UNCAF Nations Cups as well as at the 1993, 1998 and 2002 CONCACAF Gold Cups and the 1997 and 2001 Copa América tournaments.
His final international was the final 2002 World Cup match against Brazil. After retiring in April 2003 due to injury, Lonnis became the assistant of Costa Rica"s national squad, due to his vast experience as a player and his leadership.
On May 7 officially turned down Carmelita"s offer to be their head coach.