It is very rare for someone to develop a frozen shoulder without any other pathology associated. Something is making that capsule to get thicker. It could be biomechanics but then again it is extremely rare on an athlete to develop this at a young age.
I think is definitely a scapular issue. Maybe he suffers from a weak scapula(winging of scapula) and has been over compensating with the shoulder causing chronic inoingment and thickening of the capsule, hence the frozen shoulder.
If that is the case, then he might beed more than just a few weeks to recover.
I just dont understand why Philly doesnt shot him down for the year like they did with Simmons and Embid if it is really that serious.
This doesn't smell right. If I am the owner of that team and I see one of my players struggling like that, I will fligh him immediately to Alabama to see Dr James Andrew and shot him down for the year.