This is called a meniscus tear and is quite painful where you are unable to put weight on that side. Generally it doesn't heal and requires arthroscopic surgery to clean out the detritus.
I heard that he needs about 3 months to the ligaments and the muscle tissue rebuild and strengthen his knee. I think this is not a quick recovery if he really want to play football again in a short...
Cartilage is the material that lines the ends of bones at the joints. cartilage along with sinovial fluids allow the joints to move freely without wear on the ends of the bone as well as protecting...