It's really hard to say. I can see how RF would be harder due to judging flyballs and making longer throws, but CF definitely requires more range. Since the CF needs to cover more ground, he has to make more plays, so you want your best outfielder there. Or, maybe your best fielder doesn't have the speed to cover CF. Something like that. Now I'm just confusing myself. edit: RF may be tougher (i don't know, i always was a middle infielder in my vast little league experience), but CF is more important. yeah, that's the ticket.