Neither practiced at all this week, and their likelihood of playing wasn't ever very large. Along with cornerback Ike Taylor, who fractured his ankle in the Steelers' Week 13 win over the Ravens. He'll likely miss at least the Steelers' Week 15 game against Dallas as well.
Outside of those three, the rest of the Steelers' injured players practiced Friday, and are listed as probable for Sunday's game (except quarterback Byron Leftwich, who is listed as questionable with broke ribs). That includes left guard Willie Colon and wide receiver Jerricho Cotchery, neither of whom have played in the last two games.
The Steelers head into Sunday's game with the Chargers up a tiebreaker on Cincinnati for the AFC's final wild card spot. The Indianapolis Colts (8-4) are a game ahead with the advantage of owning a better AFC record (the second tie-breaker among non-divisional opponents, head-to-head record is the first).