This news comes less than 24 hours after Archie Manning revealed that his son's foot injury has been an issue since summer time. It should come as no surprise that Manning is still experiencing discomfort from an injury that goes back months.
Although Manning will make the trip to Pittsburgh this weekend, he's already been ruled out for the game.
Manning's setback changes that. If he's not capable of practicing without soreness, Kubiak has no choice but to ride out the regular season with Osweiler under center.