This year will be my 17th year with UPS. 8 years pre-load and 8 driving. Last year and a half I have been in and out of short term disability and no in long term. 2 shoulder surgery's in one year. Doctor tells me today that driving 10 plus hours a day might not be something I can do anymore. Range of motion and long term extension of my arm might be a safety hazard when driving for long periods of time and might result in frequent surgeries in the future. We wont know for sure until this summer. My questions is, if my strength is where it is suppose to be and he gives me the ok to do it. Can I bump back to pre-load on a medical reason or do I have to retire early?