Some managers claim that players which have weight under 70kg are injury prone, but your is over 80, that is why I asked you (to check if this statement is valid). You're really unlucky with that player.
I also believe that those characteristics in the box, weight/height/foot are so important as nationality or the name of the player.

your player is injury prone
sell him. let just another manager deal with him
it's not so easy to say if you spend 20 T for him.
Even if he is a free (1T I mean) nordgen, you always wonder if you made a mistake