Philadelphia Eagles linebacker Patrick Johnson was carted off the field during Friday's practice.
He went down during a drill and grabbed his left leg before being helped to the cart.
The Philadelphia Inquirer reported it was a potentially season-ending knee injury for the third-year player.
Johnson, 25, has played primarily on special teams since the Eagles drafted him in the seventh round in 2021.
He has recorded 28 tackles, one forced fumble and one fumble recovery in 33 career games (two starts).
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