Well, I have my answer thanks to a Google search. I entered "Argentina", "Rugby World Cup", and "baritone", and somehow came up with Jose Cura, who is not a baritone (shows how much I know) one of the leading tenors in the world, and a great interpreter of Verdi (also a rugby player, before he had to give up the game in favour of his career). He had such a big rich voice that it sounded baritone.

I will have to look out for his CDs.

Edmund