LANDOVER, Md. (CBSDFW.COM) – Dallas Cowboys quarterback Andy Dalton left Sunday’s game against the Washington Football Team after taking a brutal hit to the head as he was sliding during a run.

After the game ended in a loss, the Cowboys announced Dalton suffered a concussion and will enter the league’s protocol as the team gets ready to face the Philadelphia Eagles.

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The hit came from Washington linebacker Jon Bostic during the third quarter. Bostic was quickly ejected from the game.

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Dalton stayed on the field for several minutes before walking to the locker room. He was soon ruled out for the rest of the game.

Rookie quarterback Ben DiNucci from James Madison took over for Dalton, who left on 9 of 19 with 75 yards and an interception.

Dallas lost the game 25-3 as the team’s struggles continue. The team is now 2-5 on the season.

Questions were also raised as to why Cowboys players did not confront Bostic after the vicious hit. Head coach Mike McCarthy was asked about this after the game.

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“We speak all the time about playing for one another, protecting one another,” McCarthy said. “It definitely was not the response you would expect.”