Why I can't Reach My Shoulder Blades Around My Back

Now I know what mystery has ailed my right shoulder for years: internal rotation deficit. My left arm can easily reach back to my thoracic spine and touch my scapula when reaching from my hip (not over the shoulder); my right arm is limited to the lumbar spine, and that in itself is a bit painful. Pic (click for full pic):

If you're interested in looking at the "diagnostic" physical therapy pics, which are exactly like my condition as they're all showing problems in the right arm, you can go here: (see point no 13), (see point no 5).

The years of playing goalkeeper for football/soccer and futsal have dealt their damage, as I was always known as someone with a strong arm swing throw. I don't think basketball would have been responsible, as arm swings for throws only occur with very far passes. Looks like more rehab exercises are in line for my schedule.