I think RG3 is a great player and great person. However, his body has shown that it simply cannot handle the pounding of the NFL. There is no shame in cutting your losses and moving on.
If RG3 retired soon and rehabbed his ankle he could be running by January and put together a solid outdoor season. He'd be an instant star in the track world. With Bershawn Jackson and Kerron Clement getting older there'd be a chance he could even make the Rio 2016 team in the 400m hurdles.
Thoughts?