Playing in the left winger position, Præst won two Serie A championships with Italian club Juventus FC.
He played 24 games and scored 17 goals for the Danish national team from 1945 to 1949, and won a bronze medal at the 1948 Summer Olympics.
Born in Copenhagen,[6] Karl Aage Præst attended the Royal Orphanage.
[9] After the Olympics, Præst signed a professional contract with Italian club Juventus FC, and was thus banned from the amateur-only Danish national team.
The team was reformed, amateurs and ex-professionals alike, and played a string of unofficial high-profile exhibition matches that drew many spectators.