McCaffrey Questionable With Left Hamstring Strain Ahead of Week 8 Bye

Christian McCaffrey is carrying a mild left hamstring strain into the 49ers' Week 8 bye, listed as Questionable with the team expecting him back after the bye week. The Grade 1 designation is confirmed by the team's own "mild" characterization — this is micro-damage to the hamstring muscle fibers with structural integrity intact, the least severe point on the hamstring injury spectrum.

McCaffrey's injury was resolved to October 25, 2026, meaning he is now roughly two days in. The literature floor for a Grade 1 hamstring strain is 1–2 weeks, and a bye week landing almost immediately after the injury is about as good a recovery scenario as the calendar can offer. A full extra week of rest without competitive exposure meaningfully reduces reinjury risk, which is the primary clinical concern at this grade in a high-demand running back.

That said, Grade 1 hamstring strains in elite skill players — particularly running backs who depend on explosive acceleration and cutting — carry outsized RTP uncertainty despite the low severity label. The margin between 95% and 100% health is functionally significant for a player at McCaffrey's level, and the hamstring is notoriously prone to reinjury when return is rushed even slightly ahead of full tissue tolerance. The bye week absorbs the earliest part of that 1–2 week window, which is the right biological outcome here. If he's trending toward full practice participation as the team returns from the bye, the biology supports a return to play. If there's any residual limitation, the literature would counsel patience — a Grade 1 hamstring reinjury in an RB can quickly become a Grade 2 conversation.