Yep so you're validating my point - Hargreaves, Woodgate, King, plus Diaby - that's 4 examples, which is kind of what I meant by 'very few'.
Of the above examples, 3 had chronic knee issues and the other had multiple injuries all stemming from an ankle-breaking tackle early in his career.
Sturridge has had none of these things. He'll be back, don't panic ;)
So you don't buy into the theory that persistent or regular injuries have a long lasting affect on the mind of the individual, not just their physical abilities?