McKinnon (neck) wasn't listed on Wednesday's injury report, Matt Barrows of The Athletic reports.
McKinnon sustained a stinger in the 49ers' last game Week 10 at New Orleans, but with the benefit of a bye week, he managed to practice Wednesday without any restrictions. Meanwhile, Tevin Coleman (knee) was a limited participant, and San Francisco opened 21-day practice windows for Raheem Mostert (ankle) and Jeff Wilson (ankle) on Tuesday. Coach Kyle Shanahan termed each of the trio "day-to-day" Wednesday, so this backfield situation will be one to watch as this weekend's game against the Rams approaches.