Although music and film share a lot of the hype and publicity as sports, the industries are very different. It is always interesting that athletes believe that music and film are better opportunities for them and many actors/musicians aspire to be professional athletes.
I guess the grass is always greener.
But the dangers lurk below the surface as very few athletes and few sports agents have the experience to deal with the structures, games and financial manipulation which occur in music and film.
This article is an interesting starting point to get a feel for exactly how much you do not know in case you have any clients seeking to enter into these deals.