Foster (concussion) is listed as questionable for Monday's game against the Texans, Ray Fittipaldo of the Pittsburgh Post-Gazette reports.
Foster didn't practice Saturday after being a limited participant Friday, so it would appear he did not make significant further progress in the concussion protocol. The 31-year-old is likely to be a game-day decision for the Christmas Day matchup in Houston.
Foster was placed in the concussion protocol following last Sunday's loss to the Patriots, but has progressed through the protocol enough to practice on a limited basis. The 31-year-old's participation at Saturday's practice should provide more clarity on his status for Monday's game against the Texans.
Foster wasn't forced to exit early in Sunday's 27-24 loss to the Patriots, but after being evaluated a day later, it was determined that he was exhibiting symptoms consistent with a concussion. He'll need to pass all five phases of the protocol in order to suit up Week 16 against the Texans.