I think Tyson has shown he can go in the 9.60s so he can improve and we don’t really know how much his winter injury which kept him in germany for several months, cost him. The problem is Bolt can improve too, as both have been dropping their times but Bolt by more and he’s younger.
Asafa can get into the 9.60s but he needs to be healthy.
As far as I know, the surgery done on his pec last year left the ROM there lower and the lack of compensatory counter-rotation might have contributed to his ankle problem but I don’t know that for sure. One of the ART guys from Toronto was in Jamaica working on him in the spring but I don’t have all the details.