But the Foxes boss will have ample cover at his disposal for Wednesday’s visit of Burnley, with both Matty James and Neil Danns among those vying to start should the Welshman miss out.
Scan results look positive for King, despite his withdrawal after just 30 minutes of Sunday’s 2-1 defeat to Wolves.
But with James stepping in impressively as his replacement and Danns coming back into the squad after missing the trip to Molineux, Pearson need not rush his goal-scoring midfielder back too soon.
“The scan results have come back better than we expected so we’ll see how he (King) is over the next couple of days, but I think we’ll have him back sooner rather than later,” Pearson said ahead of the Burnley game.
“I suppose one of the positives from the game, even though we lost him with an injury, was that we caught it soon enough.
“Matty James went on and did a very good job so we have some good cover there. Neil Danns will come into the squad for tomorrow as well.
“You have to deal with injuries sometimes, but hopefully it’s not a long-term one.”
City take on the Clarets on Wednesday defending a 100 per cent home record in the league, having beaten both Peterborough United and early leaders Blackpool at King Power Stadium so far.