Positive it isn't the rotator cuff. I have no hinderance with pre-hab for my rotator nor any pain from it.
Tendon is a slight possibility, however even with rest like you mentioned I am still struggling with mobility and some soreness after workouts.
485/335/585 @ 198
179 @ 85
"No citizen has the right to be an amateur in the matter of physical training.... What a disgrace it is for a man to grow old without ever seeing the beauty and strength of which his body is capable."