The journey of Chris Ivory: Dismissed, discarded and, finally, celebrated

It's strange that Bush had durability issues until he left, then he went 16 game and racked up 1000+, same durability questions for Ivory. Forget Ingram for a moment, how much does this training staff suck?
His broken leg in 2010 was because of a punt return dive tackle to the knee. What training staff can overcome that?