I had a mostly unremarkable, short career in football—yet that was still more than enough time for the game to leave its mark, all over my body. I had been dealing with arthritis, joint stiffness, and backaches for years when a weight-room mishap drove me to an emergency clinic in the summer of 2010, when I was 32. Several follow-up appointments ended with me in an MRI machine and an appointment with a neurosurgeon.