Goitisolo was introduced to football during his time as a schoolboy, developing a strong interest in the sport; however, he was still too young to play professionally at the time, leading to him being signed by various teams for short periods: in a timespan of just two years he had spells at Racing FC in Liverpool, then Arsenal and Crystal Palace in London and finally Third Lanark in Glasgow, before eventually achieving his dream of playing at the top level with Real Sociedad after returning to his parents' homeland.
While studying at Saint Francis Xavier's College, Nicasio started playing for the school's Old Xaverians football team, developing a strong interest for the sport.
His goalscoring records drew the attention of one of the biggest clubs in the city, Liverpool FC, who set up a friendly with Racing in order to observe and access the possible incorporation of Goitisolo to the Reds.
[2] Despite the issue of his age, Goitisolo did not give up from his desire to be a footballer, and so, when he finished high school in 1905, he convinced his parents that he wanted to go to London to study teaching.
[2] In 1909 he managed to get signed by the newly founded Sociedad de Futbol from San Sebastián, featuring alongside the likes of Charles Simmons, the Sena brothers (Alfonso and Miguel), and George McGuinness, with the latter also being from Liverpool and an 'Old Xaverian' although the nature of the relationship between the two young men has not been confirmed.
[5] Also in 1910, Real Sociedad participated in the inaugural edition of the Pyrenees Cup, and Goitisolo netted two goals in the opening match of the competition, a semi-final clash against Stade toulousain at Ondarreta Stadium on 17 April, thus helping his side to an 8–0 victory,[4][6] However, they lost the final 1–2 to FC Barcelona.
At the end of the war, he went to the town of Soto del Barco on the coast of Asturias, where his sister Adelina lived, and worked for an English shipping company doing translations.