Costa Rica coach Jorge Luis Pinto unveiled his final 23-man FIFA World Cup squad .
Ruiz, on loan at PSV Eindhoven from Fulham, captains a team set to face Uruguay, Italy and England in Group D.
Arsenal-owned Olympiacos striker Joel Campbell is among those to have made the squad.
Pino initially named a 26-man squad with four on standby, and the three making way included Real Salt Lake forward Alvaro Saborio,midfielder Carlos Hernandez and Deportivo Saprissa defender Kendall Watson were the other players to make way.
Costa Rica 23-man roster for Brazil 2014
Goalkeepers: Keilor Navas (Levante), Patrick Pemberton (Alajuelense), Daniel Cambronero (Herediano)
Defenders: Johnny Acosta (Alajuelense), Giancarlo Gonzalez (Columbus Crew), Michael Umana (Saprissa), Oscar Duarte (Club Bruges), Waylon Francis (Columbus Crew), Heiner Mora (Saprissa), Junior Diaz (Mainz 05), Cristian Gamboa (Rosenborg), Roy Miller (New York Red Bulls)
Midfielders: Celso Borges (AIK Stockholm), Christian Bolanos (FC Copenhagen), Oscar Esteban Granados (Herediano), Michael Barrantes (Aalesund), Yeltsin Tejeda (Saprissa), Diego Calvo (Valerenga Oslo), Jose Miguel Cubero (Herediano)
Forwards: Bryan Ruiz (PSV Eindhoven), Joel Campbell (Arsenal), Randall Brenes (Cartagines), Marco Urena (FC Kuban Krasnodar)