Originally Posted by burmafrd
Genetics of course. Some people have stronger bodies. More durable.
Personality- the drive to train and prepare and everything that goes with it.
And do not forget luck- sometimes players just have bad luck.
That's the one I forgot to mention. I do think some injuries are just the result of misfortune rather than anything the player did wrong or anything in his genetics.
At some point after multiple injuries, it's definitely got to be more than just bad luck, but I do believe it plays a role.