A Lisfranc fracture/dislocation is a tough injury to have. It takes a minimum of 6 weeks to recover (non-weightbearing). It can even be 10 weeks of non-weightbearing depending on severity and type of surgery done. Be surprised if he comes back this year. Is really important to give it adequate time to heal because if this type of fracture doesn't heal correctly then you have a lifetime of painful walking. If it is a simple fracture without dislocation, then the recovery time can be quicker, but we are still talking 4-6 weeks of being in a cast.