I just finished creating my roller hockey team.
It took a while. I think you can only use the pro rinks. I didn't see an option for smaller ones, but I may have missed it because I wanted to get it done quick.
As for players. This process sucks, because you have to create each guy, instead of editing random players names.
So I created like 20 skaters and 2 goalies in about an hour. I only changed a couple attributes, so all guys I made suck. I just wish ea would allow you to edit players names in this game. It would've made it a lot easier. Or maybe have a created player come with a varied set of attributes instead of all 50's