Raiders QB Carr leaves with thumb injury; X-rays negative

Oakland quarterback Derek Carr delivered a sideline stiff-arm to punctuate a short scramble -- but it ended his afternoon.

Matt McGloin replaced Carr, but the Raiders were stopped on fourth-and-1 on the next play when Latavius Murray was held to no gain.

The Raiders also lost safety Nate Allen to a knee injury.

The game couldn't have gone much worse for the Raiders, who also were held scoreless until midway through the fourth quarter in Del Rio's first game as coach.

The Bengals cruised to a 33-13 win.

The Associated Press contributed to this report.