Sounds like the restriction is at the elbow.
What are you doing to address the situation meaning what are you doing to improve the situation.
Yes you use a lacrosse ball on your tspine, but if you are not seeing improvements this may not be where you need to be hitting. Have you used any other techniques for the t spine?
Clear the T-Spine, Now We Can Start Talking Shoulders
Episode 310: Load Ordering the Chesticles, Dipping and Pressing Part 1
Episode 310: Load Ordering the Chesticles, Dipping and Pressing Part 2
Episode 44: Global Dehydration and Stiffness, Pecs, Tri’s and Internal Rotation
Using a plate or super friend can increase the amount of pressure.
For the neck
Soft Tissue of the Neck
Jill Miller and Your Dys-Supple Neck
Seriously. Do This Yesterday. One of My All Time Shoulder Fixes
Episode 52: Up Against the Wall, Snatch Prep and Nerve Gliding Too!