Cowboys vs Redskins live stream: Watch online free Sunday Night Football 8:40 ET NBC primetime showdown in one the best rivalries in the NFL.

The 1-3 Redskins go into Arlington, Texas vs the Cowboys (2-3) for this Sunday Night Football matchup inside Jerry World. Watch the live stream online as Robert Griffin III looks to continue the success of Washington's first victory last week in a divisional matchup with first place on the line.

Tony Romo had may have had his best statistical game of his NFL career last week against Denver Broncos. He threw for over 500 yards, five touchdowns and one key interception vs the Broncos. Even though they lost, it was an impressive outing and for Sunday Night Football, watch the free live stream online to see what he can do against the worst ranked defense in the league.

"Romo played the best game that I've ever seen him play in his career -- not only from the standpoint of how he executed, not only how he created plays, but his leadership," owner Jerry Jones told the team's official website. "If we can have that type of play from him and others, especially on the offensive side of the ball, I think we'll win most of our football games left."

The Redskins give up 440 yards per game and over 31 points. Last season, Washington scored 66 total points in a pair of losses. While Griffin hasn't looked the same since tearing his ACL in the playoffs, Cowboys coach Jason Garrett is preparing for what he believes will be a difficult matchup, according to ESPN.com.

"He's certainly coming off of that knee injury, there's no question about that," Garrett told ESPN. "He's wearing that brace. You do see him throw the ball from the pocket, but again, he's made plays on the move. He's a dangerous football player, there's no question about that."

Live stream on NBC.com

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