Hi Will, I certainly relate to your recent post. I still have the tight band feeling (TBF) also, and my non-surgery knee is feeling a lot of pain recently. I am hoping that for both of us, this is perhaps weather related and will go away. Or perhaps our gait is off because of the TBF and we're using the non-surgery knee/leg incorrectly. At least you are still playing pickleball, that's good, but you know when you do a lot of activity, you do end up paying later. I mean you, and I! I got sore after doing PT or even exercises at home. Sometimes I have to have a day to just not do much except regular moving around. I have had endless bouts of pain in my TKR knee and am seeing a pain management doctor soon. Some of the trouble it seems is coming from my back, and I wonder if that is happening with you as well. I look forward to hearing your report about meeting up with your doctor - maybe ask him/her to take an X-ray of the painful right knee?
I don't really think it's your age as much as, this surgery is a bear. With teeth and big claws.