 Paco Bru began his career in the spring of 1902 with FC Internacional —when he was only sixteen years — playing a friendly tournament called "Medalla de la Federación Gimnástica Española" (Medal of the Spanish Gymnastics Federation).He played ten out of twelve games as a striker and scored three goals, his team finishing sixth out of seven teams.On 30 November 1902, Bru made his debut in official competition, the Catalan football championship, in a 6–0 defeat to Club Español.