Is Kyle Shanahan to Blame for Christian McCaffrey's Injury?
Christian McCaffrey's injury against the Bills could be due to the heavy workload he received since returning to the 49ers.
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VIDEO: New Gruesome Slo-Mo Video Shows Close-Up Of Christian McCaffrey’s Calf Exploding Before He Went Down With Injury
Slow motion video shows where 49ers running back Christian McCaffrey seemingly injured himself and ended his season.