[3][4] Buylla was born in Asturias as the son of (Adolfo A. Buylla, professor of Political Economy and president of the Ateneo de Madrid, and of Carmen Lozana de la Concha.

[3][5] Buylla and his family used to spend the summers in Salinas, where it is known that he and his brothers played football matches with the team from the town of Castrillón.

[3] Buylla enjoyed his youth playing football, which at the time was a relatively unknown sport in Asturias, being a part of the very first teams in Ávila, such as Sport Club Avilesino, with whom he played between 1914 and 1918, a period that he combined with his participation in several teams in the Spanish capital.

[3] His access to a legal-military career took him to Zaragoza, where he settled and where he was even one of the promoters of the Stadium in said town.

As a Racing player, Buylla was eligible to play for the Madrid national team, being called-up by them for the 1917 Prince of Asturias Cup, an inter-regional competition organized by the RFEF.