Not sure on severity ....but I have a different school of thought than those who think his return is a bad idea or too soon after such an injury.
He should come back when the medical staff says he's a 100% if that's now then let's go.
This is modern time million dollar athletes getting rehab and advice from the best medical professionals on the planet.
The Rams are not going to put Cam in harms way..... If you see him out there Sunday it's because he's 100% and at no further risk to injury than any of the other 53.
It isn't like he's running a couple 20 yrd sprints on the sidelines and telling McVay ..."I think I can gut this out"
It's big biz and the Rams are far from desperation mode the way Sony is playing.
If he's active he's good to go.
Another discussion could be had to if he's more at risk to fumbling or something having not taken any contact all season
