He wasn't in on all the nickel packages. I couldn't really figure out the rotation there. I don't think he replaced Akin either, since Akin doesn't play nickel.
It seemed to be some combination of Burnett, James and Carpenter, but primarily James and Burnett.
Carp got a bad rap on the kickoff return, I think. His lane appeared to be on the other side of the field, he was just one of the few that gave chase.
Singleton did nothing on the kick return and Roy got blown up by two guys. That sprung the return.