Ashton is not injury prone, thats a commoin misperception as he has spent so much time injured. The bloke had Shaun Wright Phillips break his fucking ankle in a dirty challenge whilst training for England.
Here's the injuries he has had throughout the whole of his career;
If you can tell me how any of those are linked or make him injury prone please do
The bloke was out for over a year, he took his time to regain his fitness but I ensure you he has reagined full fitness and has no complications from any of his previous injuries.