Costa Rica coach Jorge Luis Pinto has named a 26-man squad for the World Cup finals in Brazil, with three names to be cut before the competition.
The Colombian has chosen 11 Europe-based players, led by Fulham midfielder Bryan Ruiz, who is on loan at PSV Eindhoven, and Olympiacos striker Joel Campbell.
Costa Rica will face England, Italy and Uruguay in Group D, with their first match against the South Americans in Fortaleza on June 14.
Hansell Arauz, Esteban Alvarado, Ariel Rodriguez and Jairo Arrieta were named as reserves to complete the 30 names required by FIFA and will not take part of the training camp.
Costa Rica will play Japan on June 2 and Republic of Ireland four days later, both games in the United States.
Costa Rica squad:
Goalkeepers: Keilor Navas (Levante), Patrick Pemberton (Alajuelense), Daniel Cambronero (Herediano).
Defenders: Johnny Acosta (Alajuelense), Giancarlo Gonzalez (Columbus Crew), Michael Umana (Saprissa), Oscar Duarte (Brugge), Waylon Francis (Columbus Crew), Heiner Mora (Saprissa), Junior Diaz (Mainz), Christian Gamboa (Rosenborg), Roy Miller (Red Bull New York), Kendall Waston (Saprissa).
Midfielders: Celso Borges (AIK), Christian Bolanos (Copenhaguen), Oscar Esteban Granados (Herediano), Michael Barrantes (Aalesund), Yeltsin Tejeda (Saprissa), Diego Calvo (Valerenga), Jose Miguel Cubero (Herediano), Carlos Hernandez (Wellingtong Phoenix).
Forwards: Alvaro Saborio (Real Salt Lake), Bryan Ruiz (PSV Eindhoven), Joel Campbell (Olympiacos), Randall Brenes (Cartagines), Marco Urena (Kuban Krasnodar).