Jordan Mason Has AC Sprain

The 49ers believe RB Jordan Mason is dealing with an AC sprain in his left shoulder, ESPN's Adam Schefter reports. The injury "is not considered serious, but he will undergo further testing today," Schefter adds. It sounds like Mason at least has a chance to be ready for Week 7's game vs. the Chiefs. We'll look for further updates on his status. Rookie Isaac Guerendo will likely operate as San Francisco's lead back if Mason misses time.