At least in Oregon you dont have to fight amateur at all before going pro. You just have to pay for the pro card and get the physical and youre good to go. The good thing about fighting ammy though is you have a chance to build your name and get paid more when you do get your pro card. Ive seen alot of guys go pro after only one fight and get paid $500 total and thats including the win bonus. I also saw an amateur champion go pro and fight for 1500 for his pro debut. Plus even if you have a losing record as an amateur it all goes away when you turn pro. Its a good way to get all the first time fighting jitters out of the way.