It goes without saying something is wrong, but the way he's getting injuries, something must seriously seriously be wrong.
The injuries are not innocuous or spread out, it's again and again in the hamstrings/quads, the same area over and over again.
I have to say, it seems like he has an intrinsic problem with his musculature/physique. He has told that when he is injured he has a lot of time to add muscle mass but he's added practically zero over the course of 2 or 3 years. That isn't normal for a young fit athlete.
I ask again, is he doing his physical program in conjunction with the club's specialists or under the guidance of a trained conditioning coach? It seems like a complete amateur is controlling his physical routines.