Harper practiced fully this past week as he tried to come back from a knee injury that has now sidelined him seven games.
Jenkins was limited in practice by a knee injury and is missing his second straight game.
Hatcher, who has seven sacks, had been questionable with a neck injury.
Also among the Saints' deactivated players was defensive tackle Tyrunn Walker, who's been slowed by a knee injury, while running back Khiry Robinson was a healthy scratch.
Dallas' inactives also includes receiver Miles Austin, who'd been listed as doubtful with a hamstring pull.
AP NFL website: www.pro32.ap.org
- American Football
- Sports & Recreation
- Jason Hatcher
- Dallas Cowboys
- Malcolm Jenkins
- Roman Harper