[3] On 1 September 1920, Spain faced Sweden in the quarter-finals of the 1920 Summer Olympics, and they were trailing 0–1 when the captain, José María Belauste, launched a voice to teammate Sabino Bilbao that was picked up in the chronicles by the only Spanish journalist present at the match, Hándicap, who thus collected one of the most mythical phrases in the history of Spanish football: "¡A mí el pelotón, Sabino, que los arrollo!"

[6][8] And that is how it went, with Belauste scoring the equalizer, thus immortalizing this phrase that was subsequently viewed as the reason why the national team was dubbed Furia Roja (Spanish Fury).

[9] He combined his work as national coach with the role of vice president of the Real Vigo Sporting, a position he used to promote, together with Juan Baliño [es] and Pepe Bar [es], the idea of merging Sporting with his city rival Fortuna de Vigo, to achieve a more powerful team that could successfully compete against the likes of Real Madrid, FC Barcelona, and Athletic Bilbao.

[3] He began to work on the idea in the mid-1910s, which would fail in his first attempt in 1915, but this did not discourage him, and in his second attempt in 1923, he reached an agreement between the two sides;[2] taking advantage of the fact that the Galician national team, a combination of the best players from Vigo, had reached the final of the 1922–23 Prince of Asturias Cup after beating the likes of the Centro team (a Castile/Madrid XI) by a score of 4–1,[10] and despite losing the final, the Galicia fans were very pleased with the team's performance in the competition, thus welcoming with tremendous enthusiasm the idea proposed by Manuel de Castro, and hence, on 23 August 1923, Celta de Vigo was born.

His death caused deep sorrow throughout the footballing world, where Hándicap enjoyed great prestige at a local, regional and national level.