He was a member of the Spanish team that won the silver medal in the 1920 Summer Olympics as well as a Copa del Rey winner with Arenas Club de Getxo.

[1] Born in Santurtzi to an architect and a piano teacher, Pagaza began playing football at Colegio Orduña and during his time as a student in England.

[3][4] Pagaza was one of the eleven footballers that played in Norte's first-ever game on 3 January 1915 against Catalonia, and once again he scored in a 6-3 win.

[5][6] In May 1915, he was selected to represent the Norte team in the first edition of the Prince of Asturias Cup, an inter-regional competition organized by the RFEF.

[1] In total, he earned seven caps for Spain, four at the 1920 Olympics and three in friendlies, the last of which was on 17 December 1922 at Estádio do Lumiar in Lisbon in a 2-1 win over Portugal.