You must purchase a pass. But you must be a season ticket holder to be able to purchase a pass. 15 year season ticket holder I am and I wasn’t offered a pass and can’t get into the bills lots. Beyond PO’d about it as well!
I broke my tibial plateau in a motor cycle accident 9 years ago. I didn’t have any ligament damage either. I did however have a steel plate and 7 screws put in. It’s a long road to get back.