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Arthur left the game on a cart but managed to stand under his own power and tipped his cap to the crowd to let them know he was in decent spirits.
The Ravens announced the injury later in the game.
Arthur’s absence left the officiating crew with six members, a situation officials prepared for during the fourth week of the preseason.
Arthur, 58, has been an NFL line judge since 1997 and has worked 15 postseason games in his career.
