It was a "high" ankle sprain he got during the long run. As far as I'm concerned there are degrees, though some people hear high ankle and wet their diapers. He had been battling hamstring issues since camp IIRC. The team seems to have more injuries. It could be adapting to the new practice rules or luck catching up.
regular ankle sprains are bad for a rb like him and high should be even worse i guess he toughed it out. meh his hamstring yea maybe different training or just natural. Heck he may have just come in out of shape expecting to not play ever for all we know lol. I like him more then powell though i think he can be a "playmaker" by himself