It's perfectly valid for people to be concerned about his injury history, particularly since some perfectly respectable sources have questioned whether he was the same player after coming back from the ACL.
We've just sat through five years of Marcus Davenport failing to live up to his potential because of one injury after another. The same is seemingly being played out again with Turner....
That's why people are concerned. He could be the second coming of Reggie White but that's not much good if he's not on the field.
I'm more concerned about his weaknesses vrs the run where he gets turned too easily and just gets washed out by double teams....hopefully this is Coachable stuff.