Samuel is considered day-to-day with a strained groin, Matt Maiocco of NBC Sports Bay Area reports.
After Sunday's 20-7 win against the Rams, coach Kyle Shanahan relayed his belief that Samuel was tending to a quadriceps injury. While the issue in reality is slightly different, Samuel's activity level this week will be one to watch as the 49ers prepare for a Week 7 visit to the Washington DC area.