Jackson (calf) did not practice Friday and has been ruled out for Sunday's game against the Cowboys, Mike Triplett of NewOrleans.Football reports.

Jackson has not been able to participate in practice for two straight weeks, and he'll have to wait until Week 3 against the Eagles to make his regular-season debut. Anfernee Orji will serve as the top reserve linebacker for the Saints on Sunday behind starters Pete Werner, Demario Davis and Willie Gay.