Raiders rookie quarterback Derek Carr was forced out of Friday's preseason game against the Lions with an apparent rib injury.

Carr entered the game in the second quarter for Matt Schaub and sustained the injury late in the fourth quarter. He was taken back to the locker room for further tests. While walking back to the locker room, Carr told team doctors he "heard a crunch," according to Sports Illustrated.

Carr threw a 3-yard touchdown pass to Jake Murphy in the third quarter. He completed 9 of 16 pass attempts for 109 yards, with one touchdown and no interceptions. He was replaced by Matt McGloin in the final minutes of the game.

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