49ers' backup running back battle remains unresolved ahead of Week 1

The San Francisco 49ers face uncertainty over the backup running back position, with Jordan James back at practice following a rib fracture. He is competing with rookie Kaelon Black for the No. 2 role behind starter Christian McCaffrey. Offensive coordinator Klay Kubiak confirmed the rotation is not finalized, suggesting both players will continue to compete until the regular season begins. Black, a third-round pick, impressed in his preseason debut against the Chargers, but Kubiak indicated a rotation will be utilized rather than a single backup. Isaac Guerendo is sidelined due to a shoulder injury, highlighting the importance of establishing depth in the backfield for the upcoming season.

• 12:00 AMYahoo Sports — Decision on significant 49ers position battle might wait until Week 1