Coach Kyle Shanahan said Tuesday that Hurd (back) will be re-assessed next week and won't play in the preseason finale Thursday against the Chargers, Nick Wagoner of ESPN.com reports.

This is certainly not a good time to have a setback, as the rookie's status for Week 1 is quite uncertain ahead of the regular season. It will be the third straight preseason game missed for Hurd, and the team seems to be prioritizing his long-term health while he deals with back tightness. The 49ers are dealing with a slew of injuries to their receiving corps, so depth receivers probably will be called to action for Thursday's tilt.

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