That is not a happy knee. Not to wake Karl up but if you can probe each attachment with your fingers you might be able to isolate the root cause. I would start with inside or outside. Being an athlete I am guessing you have already done this tho which was why you are thinking gout? Ice on ice off, Tylenol for inflammation if you can take them. (brutal on stomach) let it heal guy, you may have just loaded it in an awkward position working on your Dads car.
