“He has looked good,” Harbaugh said of Jones, who was also the deep returner for the first kickoff Thursday and started at punt returner for much of last season. “That’s the thing that makes us feel good about it. Cyrus has looked good, and we have other guys we work in there. All of our corners end up — not all of them, but most of them play nickel, except the two starters [Jimmy Smith and Marlon Humphrey]. Brandon Carr plays the nickel quite a bit. We move safeties down in there quite a bit, with different personnel groups.