The shoulder injury is disappointing. I'm curious to see if he'll get more surgery in the off-season.
I've dealt with repeated dislocations in the past. The shoulder "moves" because the joint / tendons holding the shoulder in place have become "loose". So, the shoulder momentarily pops out of joint, usually popping right back into place. From experience, it stays sore for a couple of days, sometimes a week, and then you feel normal again.
Surgery is supposed to repair that "looseness" by rebuilding the shoulder. I had mine repaired arthroscopically -- like Perk -- and it worked great; I'm back to about 95%, and haven't had any dislocations since then. Perk, obviously, hasn't been as lucky. I'm curious if the team decides at some point to go with open surgery. That would extend the recovery time, and has more risk, but also is supposed to be slightly more effective.