Johnson announced he is retiring from football Sunday.
Johnson had zero carries and gathered in all both of his targets for 28 yards during Sunday's 10-7 loss versus the Panthers.
Johnson posted seven rushes for 16 yards and caught his only target for eight yards during Saturday's 17-10 win versus Cleveland.
Johnson tallied four carries for 12 yards a fumble during Sunday's 21-18 win over the Falcons.
Johnson is slated to serve as the top backup to starting running back Alvin Kamara in Sunday's game against the Falcons, John Hendrix of SI.com reports.
The Saints signed Johnson from the practice squad to the 53-man roster Monday, Field Yates of ESPN reports.
Johnson notched one carry for negative four yards and gathered in their only target for 11 yards during Sunday's 27-20 victory against the Rams.
Johnson was elevated to the Saints' active roster Saturday, John Hendrix of SI.com reports.
The Saints signed Johnson to their practice squad Wednesday, Jeremy Fowler of ESPN.com reports.
The Saints and Johnson were unable to come to contract terms, Nick Underhill of NewOrleans.Football reports.