Pittsburgh coach Mike Tomlin announced Tuesday at his weekly press conference that Conner's ankle contusion is now considered a sprain and he will be held out for this week's game against the Raiders.
James Conner's ankle injury is worse than the Steelers thought.
Conner has had a high-flyer of a season so far, having been giving the starting place after Le'Veon Bell chose to sit out for the season when he opted to not sign his franchise tender.
Conner has rushed for 909 yards and scored 13 touchdowns for the Steelers during his second season as a pro. Ridley hasn't seen the field since the November 8 contest with the Panthers.
It is likely rookie Jaylen Samuels will be first in line to replace Conner having come on for him against the Chargers and caught a 10-yard touchdown pass. After playing in Oakland this coming Sunday, Pittsburgh will then host the Patriots, travel to New Orleans to face the Saints, and then close out the season at home against the Bengals.