Years ago, I handled this very problem for another “17” year old football
player with a swimsuit body garment (upper section) and appropriate
“reinforced” elastic and dacron vector restraints sewn into the body of the
garment. You can control most of the unwanted movements with this approach
and it will pass mustard at the “football safety directors” camp.
You likely won’t find this device in a catalog, but most formally trained
orthotists will be able to tackle such a project. It won’t be cheap, but it
should help solve the problem.
Wil Haines
