The New Orleans Saints placed three players on the physically unable to perform list, according to Ian Rapoport of NFL Network.
Harper's injury was not disclosed by the Saints, but he is joined on the PUP list to start camp by linebacker Victor Butler, who is coming off an ACL injury and cornerback Patrick Robinson, who also suffered a knee injury in mini-camp.
Harper is scheduled to start alongside first-round pick Kenny Vaccaro for the Saints at safety.
Follow me on Twitter @TerryMc13
Terry McCormick covers the Titans for TitanInsider.com
DEC 12 Joel Corry
Should San Francisco decide to part ways with its quarterback, here’s how it would work.
DEC 10 Erik Oehler
Sometimes they aren't out to get you.
DEC 09 Jeff Fedotin
Anderson, Sanders, revamped O-line complement Peyton.