The San Francisco 49ers added running back Christian McCaffrey to the injury report on Saturday, making him questionable for Sunday's game against the Tennessee Titans with a back issue.

Despite the questionable designation, a source told ESPN's Adam Schefter that McCaffrey is expected to be "good to go" against Tennessee.

As the Niners returned from their bye this week, McCaffrey said he was "rested and recovered" on Wednesday, taking his usual veteran's rest that day. He then was limited in practice on Thursday with an illness but was a full participant in Friday's practice, which is more of a walkthrough.

"I know he wasn't feeling well, but he looked good today," coach Kyle Shanahan said on Friday.

That would indicate the back issue flared up either after Friday's practice or

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