is this your first DSLR. if so then consider a canon 70d also go try them out see which suits you. if it feels right then thats a long way to being right, dont settle for i will get used to it.
when you buy a DSLR you buy into a system so make sure that system fits your needs.
Sports photography needs a good frame rate so check that out too depending on the sport you will need a long lens too