Holy Leg Length discrepancy!
These pix come to us from one of our brethren, Dr Scott Tesoro in Carbondale of a 73 yr old golfer with mild LBP and a L knee replacement three yrs ago. He has a VERY short R leg (close to an inch).
What you are seeing is he ultimate compensation for a short leg. Note how he takes the shorter side and supinates it (to the max!). You can see the external rotation of the lower leg and thigh to go along with it. If you look carefully and extrapolate how his left leg would look “neutral”, you can see he has internal tibial torsion on this (right) side as well. He has some increased midfoot pronation on the right compared to the left, but not an excessive amount.
A full length sole lift would probably be in order, as well as potentially addressing some of his compensations. Wow, what a great set of pictures !