There's already a lot of active research going on using the Crispr technology to fix diseases like Duchenne muscular dystrophy or cystic fibrosis or Huntington's disease. They're all diseases that have known genetic causes, and we now have the technology that can repair those mutations to provide, we hope, patients with a normal life.

To go to hospitals and see people fight and overcome cystic fibrosis or cancer or any number of illnesses is to see courage that is humbling. And athletes constantly need to be humbled.

To go to hospitals and see people fight and overcome cystic fibrosis or cancer or any number of illnesses is to see courage that is humbling. And athletes constantly need to be humbled.