"Linebacker Patrick Willis and left tackle Joe Staley are listed as questionable for Monday's meeting against the visiting Steelers, but it appears that only Staley has a chance to play.

Willis (hamstring) did not participate in Saturday's walk-through and again did rehabilitation work on an adjacent field. On Friday, defensive coordinator Vic Fangio indicated that he wouldn't be comfortable playing Willis if he didn't practice during the week.

"Probably not," Fangio said. "When you're dealing with a hamstring injury, the guy has to show that he can run.""