SANTA CLARA, Calif. (AP) — San Francisco 49ers quarterback C.J. Beathard has an injured right wrist that could keep him out of this week's game against the Oakland Raiders.

Beathard got hurt in the second quarter of a loss on Sunday at Arizona when he hit his hand on a helmet. He stayed in the game but coach Kyle Shanahan said Tuesday that Beathard is unable to practice or hold on to a ball.

Shanahan said he doesn't know if Beathard will be able to play Thursday night. Beathard has lost all five starts this season and is 1-9 in his career.

If Beathard can't go, the 49ers will turn to Nick Mullens. Mullens spent last season on the practice squad as an undrafted free agent before getting promoted following a season-ending knee injury to starter Jimmy Garoppolo in September. Mullens has not taken an NFL snap.

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