Johnson (toe) didn't practice Wednesday, Chris Halicke of DKPittsburghSports.com reports.
Johnson caught 10 passes for a season-high 98 yards in Sunday's 24-16 win over the Panthers, but he came out of the game dealing with turf toe and now appears uncertain for Saturday's matchup with the Raiders. Head coach Mike Tomlin said earlier this week that he expected Johnson to play against Las Vegas, and a return to practice Thursday would put the veteran wideout on track to make good on Tomlin's prediction.