Hi,

yes re-injury is possible, however, with proper training there is no reason you should not be able to play full contact again. If someone says otherwise, then ask yourself why persons with broken bones can get back playing american football again. They have sports/rehabilitative specialists who know what it takes to overcome injury.

Although ligaments to a certain extent may not be 100%, they can repair, and do so spontaneously so long as they are not over-stretched repetitively during the healing phase, and the joint remains in a good position and alignment.

Regards