This question appears to be asking about creating a fantasy football type of game system for rock bands. That's great. But is it on topic for us?

A quick Google search will tell you that fantasy football is extremely similar to D&D. However, all those articles and posts are written with an agenda: trying to lift the social stigma from RPGs by comparing them to a more "cool," socially-acceptable game. This means these articles are strongly biased, having every reason to cherry-pick similarities and ignore whatever differences might exist between the games.

Fantasy football looks more like a competitive strategy game than an RPG to me, but I don't know enough about it to say that with any confidence--so I bring it to you, O Groupmind.