Do sports medicine clinics offer mri scans or something equivalent?

Some do some don't: it is a very variable answer. Some shall we say more advanced clinics will

They: may or may not. If not, they probably work closely with one or more imaging facilities that do.

Some: Some do, some offer on site flouroscopy, radiographs, or ultrasound. Virtually all have a relationship with an imaging provider that they will commonly refer to