San Francisco 49ers running back Christian McCaffrey was added to the injury report on Saturday with a back injury that will deem him questionable for Sunday's home game against the Tennessee Titans.

San Francisco 49ers star Christian McCaffrey's availability for Sunday's game against the Titans is uncertain due to a back issue, despite earlier opt

The Dallas Cowboys receiver was injured during last week's loss to the Detroit Lions when he went up for a deep pass in the end zone and was contorting his body trying to make a one-handed catch. He couldn't make the catch and then landed hard and his head slammed on the ground.

Christian McCaffrey is still one of the 49ers' best operators.