Depends on what you mean by "sports medicine." Sports medicine can mean anything from taking care of general MSK issues in active patients to taking care of D1/elite athletes, covering games, training rooms, and large events. I find a lot of time med students don't appreciate that difference. If you're thinking more general MSK, most of the "top half" or so programs will give you decent exposure. If you're talking more covering games, training rooms, large events, etc. then it becomes a little more particular. Probably the biggest potential difference between programs is their affiliation with an institution that has NCAA sports. In general it's easier to get NCAA exposure if your residency program is affiliated with an NCAA school, especially at schools that have lots of lower profile sports (soccer, lacrosse, wrestling, gymnastics, etc.). For example, sports like women's soccer and field hockey often don't have any physician there full time and it's easy for a resident to cover the games with the trainer. Sports like football and men's basketball always have physicians (often multiple) so there's much less hands on experience but at least you can say you were there. And for large events, any program in a big city is going to have plenty mass events to cover throughout the year.