كتب : Omar AbdelAziz
The Ticos moved to the summit with nine points from four games, two ahead of the US, who were handed their first loss in the final round.
Alvaro Saborio, Celso Borges and Pablo Herrera scored for the home side in San Jose, whilst Landon Donovan netted a consolation penalty for the Americans.
USA's next challenge will be against Honduras on June 7th, one week before facing Italy in their Confederations Cup opener.
USA will compete in Group B alongside Brazil, Egypt and the Azzurri in South Africa.
The CONCACAF Champions will meet Egypt on the 21st of June.