After surrendering a staggering 18 sacks in the past three games, the 49ers (10-3) are facing the prospect of playing without left tackle Joe Staley for the Monday night matchup against the Steelers (10-3) at Candlestick Park.
The blindside blocker is still recovering from a concussion and hasn’t participated in practice this week.
Staley, who took a blow to the head against Arizona and didn’t return, ran light sprints on the sideline during the portion of Friday’s practice open to the media but did not participate with the team. One of the leaders of the line and the 49ers, Staley said he feels fine now but is unsure if he’ll be cleared to play.
The left tackle is going through a series of neurological tests this week under the NFL’s concussion protocol.