Some of the concussions (of which only a few were diagnosed - I avoided doctors for the others) and shoulder dislocations (five diagnosed, a few more I set myself) weren't fun. Shoot, I still can't throw overhand.
But the worst injury I suffered at one time was torn medial and lateral menisci and a dislocated patella. FWIW, menisci are the cartilage shock absorbers in the knee, the patella is the kneecap.
I had arthroscopic surgery on my right knee back in the mid 80's at GMH in Batavia to repair it but it still acts up every now and then. Although a limp isn't usually noticeable, temp and pressure changes create discomfort that seems to be getting worse with age.
The doc also said my cartilage is degenerating in that knee and eventually I'll need to go in for knee replacement surgery, but I guess I'll cross that bridge when I get to it.