It was reported as a tweak, which does not seem like a term that fits with a shoulder. It sounds like coach speak. It's probably not ideal to speculate but with the information being limited I wonder if it could be a mild separation.
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www.mayoclinic.org]
Separated shoulder - Symptoms and causes - Mayo Clinicwww.mayoclinic.org › symptoms-causes ›
Apr 16, 2019 - In a mild separated shoulder, the ligaments might just be stretched. In severe injuries, ligaments might be torn. A separated shoulder is an injury to the ligaments that hold your collarbone (clavicle) to your shoulder blade. In a mild separated shoulder, the ligaments might just be stretched.
Treatment
Most people enjoy a full recovery after conservative treatment. A minor separation usually heals within a few weeks. A more severe separation might take several weeks to months to heal. You might always have a noticeable bump on the affected shoulder, but it shouldn't affect your ability to use that shoulder.
