After the game Raiders Head Coach Jack Del Rio said Carr was dealing with "back spasms."
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The former Fresno State star was hurt on a play when he was twisted up and took a knee to his back on a sack. Prior to the injury, Carr was 10-18, 143 yards with a touchdown.
Carr ended last season with a broken leg in a game at home against the Colts.
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Postgame presser with Derek Carr