Diego Gerardo Calvo Fonseca was born on March 25, 1991 in San José, Costa Rica and made his IFK Göteborg debut in the 2014 season, which was also the debut season of team mate Søren Rieks. As a result of this, he became the first player from Costa Rica to represent IFK Göteborg. At 23 years, 4 months and 26 days, on August 20, 2014, he took part his first competetive game against Assyriska IK in a Svenska cupen game that ended 5–0. He has spent one season with the IFK Göteborgs first team, and during his career he played in 4 first team games and scored 2 goals. Out of these 4 first team games, 3 were Allsvenskan games.
Diego Calvo is with his 3 Allsvenskan games number
435 on the list of those who have competed in most Allsvenskan games for IFK Göteborg. In the 2014/15 season he had a part in IFK Göteborg winning the Swedish Cup. In total, Calvo has represented the Costa Rica national team on 10 occasions and scored 1 goal. 31 year old Calvo completed his last season with IFK Göteborg 2014.