McCaffrey (thigh) is questionable to return to Sunday's contest in Atlanta, Jennifer Lee Chan of NBC Sports Bay Area reports.
McCaffrey appeared to take a big hit at the end of a 24-yard catch on the 49ers' first drive, but he continued to play through it until the team's third possession, when he stayed on the sideline to get worked on by the training staff. During McCaffrey's absence from the contest, rookie Kaelon Black will be San Francisco's primary running back.