i use to be a pitcher and had to have my shoulder mri'd all the time.

just having a scope you will be out for a month or more.
surgery will be at least 6 to be fully 100%

the knot you are talking about.... after surgery and therapy if it is still there go to a sports massager.......they will work it out

(disclamier.... i am not a doctor, i speak only from experience. i am not liable for bodily damage or mental damage. in short terms.....its my .02 cents, take it with salt)