LANDOVER, Md. (AP) — Washington Commanders coach Dan Quinn wiped blood from his face as he walked to the locker room at halftime Sunday after getting knocked down on the sideline in a collision with quarterback Marcus Mariota. At the end of a 4-yard run in the final seconds of the second quarter of Washington's game against the visiting Las Vegas Raiders, Mariota was shoved out of bounds.

He knocked into Quinn, who fell backward and slammed his head on the ground. The second photo in the slideshow below may be alarming to some; viewer's discretion is advised.

LANDOVER, MARYLAND - SEPTEMBER 21: Bobby Wagner #54 of the Washington Commanders checks on Head coach Dan Quinn of the Washington Commanders after he hurt his nose during the second quarter against the Las Vegas Raiders at Northwes

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