# San Francisco 49ers running back health updates

> Live situation record from CLSTR: https://clstr.news/situations/san-francisco-49ers-running-back-health-updates
> Updated: 2026-09-18T00:44:00.000Z. Sources: 6. Developments: 2.

During the San Francisco 49ers season opener against the Los Angeles Rams in Australia, running back Christian McCaffrey experienced cramping. This ailment led to a increased workload for rookie Kaelon Black, who recorded 65 rushing yards on 14 carries.

Following the Week 1 victory, Black was listed as a limited participant in practice due to a groin injury. Head coach Kyle Shanahan stated the team is “just being smart with him” and indicated there is no significant concern regarding his availability for the Week 2 game against the Dolphins.

## Timeline

### 2026-09-18: San Francisco 49ers rookie Kaelon Black manages groin injury

49ers rookie running back Kaelon Black is managing a minor groin injury, but head coach Kyle Shanahan remains optimistic about his availability for Week 2 following an impressive NFL debut.

6 sources. https://clstr.news/cluster/san-francisco-49ers-rookie-kaelon-black-manages-groin-injury

### 2026-09-11: Christian McCaffrey battled cramps during 49ers victory over Rams

San Francisco 49ers RB Christian McCaffrey battled cramps during the team's 27-7 win over the Rams in Australia, leading to an increased workload for rookie Kaelon Black.

2 sources. https://clstr.news/cluster/christian-mccaffrey-battled-cramps-during-49ers-victory-over-rams

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Cite as: San Francisco 49ers running back health updates. CLSTR, https://clstr.news/situations/san-francisco-49ers-running-back-health-updates