As someone with Irish ancestry (way, way back), I’ve written a bit before about Irish immigration to Argentina. A great resource for this topic is the wonderful Irish Migration Studies in Latin America (IMSLA).
As the articles in this journal demonstrate, the contribution of the Irish and subsequently Irish-Argentines to the sporting landscape was varied and wide-ranging. Many Irish people who worked for British-owned railways or businesses were either co-founders or members of the first sports institutions, initially cricket clubs and later football and rugby clubs.
Even if you don’t have a strong interest in sports, there are a lot of fascinating historical insights about Buenos Aires and Argentina in these well-researched articles.