49ers running back Christian McCaffrey missed practice again Tuesday. Offensive coordinator Klay Kubiak attributed McCaffrey’s absence on Monday to tightness, with nothing more specific.

The concern is McCaffrey had calf tightness during the 2024 training camp that carried into the season. He played only four games with what was later announced as Achilles tendinitis and a separate injury to his posterior collateral ligament.

Coach Kyle Shanahan, though, said he is not concerned by McCaffrey’s current setback.

“No,” Shanahan said, via David Bonilla of 49erswebzone.com. “My concern would be him toughing through tightness, like a lot of people…

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