Cowboys place S P.J. Locke on injured reserve

The Cowboys made some changes to their roster ahead of Sunday's game against the Ravens in Brazil.

>Safety P.J. Locke has been placed on injured reserve. He was ruled out for this week with a foot injury and will miss at least three more games.

>Locke started one of the team's first two games and had three tackles over the last two weeks.

>The Cowboys signed linebacker Justin Barron off of the practice squad to fill the opening on the 53-man roster. He was elevated to play on special teams in Week 1.

>The Cowboys also elevated defensive back Reddy Stewart from the practice squad for Sunday's game.