Johnson (hamstring) was considered limited at the Bills' walkthrough practice Wednesday.
Johnson reeled in all four of his targets for 72 yards during Monday night's 37-34 overtime win against the Rams, but he may have picked up a hamstring injury in the process. The running back's ability to be limited Wednesday is a positive sign, but he'll have two more chances to log a full practice and erase any concern about his availability for Sunday's contest versus Las Vegas.