we all call them amateurs, because they are hobby players, who got together to play.
this is often the case in many sports, including those that wen to the olympic.
I can' remember off hand, but I think there are many examples from various sporting codes where they took annual leave from work, to go to the olympics
some of them even unpaid leave.
They had a full time job and the part time hobbie ended up in national colors. Maybe we can call them pros in their own country, so that just means we have entry level pro and high end pros