I had my first knee surgery when I was 17 (Torn Meniscus)
I had my second knee surgery when I was 20 (Partial tear of ACL)
I had my third knee surgery when I was 28 (Torn Meniscus and they removed all of the Cartilage from my femur, where the knee cap rides)
I had my fourth knee surgery when I was 34 (Micro-Fracture Surgery)

Micro-Fracture Surger: Dr's have found that if they can get blood to flow from the bone, that in some cases the bone will re-generate cartilage. Hence when I had my last surgery, they drilled over 100 tiny holes in the head of my femur to get the bone to bleed and hence re-generate the cartilage.

Of course being stuborn as I am, I coached the day after surgery!

All on the same knee!

Hopefully I am done with that

However because I am 37 and I still roll around with my three high school wrestling sons and I still play a mean game of Softball.

Who knows!

Believe it or not I still would not trade all of the athletics to have had no surgeries.