The Washington Football Team (6-8) will look to stay in the postseason race when they take on the Dallas Cowboys (10-4) in a key NFC East showdown on Sunday Night Football. Dallas is a nine-point favorite in the latest Washington vs. Cowboys odds from Caesars Sportsbook, while the over-under is 46.

Before making any Washington vs. Cowboys picks or other NFL Week 16 predictions, you MUST see which side SportsLine expert Mike Tierney is backing.

A national sportswriter whose work appears in The New York Times and Los Angeles Times, Tierney has covered the NFL for decades and reported from seven Super Bowls. He's used his experience to crush the NFL, going 187-147 against the spread the past three seasons. 

In addition, Tierney is an outstanding 27-12-1 on his last 40 against the spread picks involving the Washington Football Team! Anyone who has followed him is WAY UP!

Quarterback Dak Prescott continues to power the Dallas offense and has achieved his second career season with 25 or more touchdown passes (25) and his fourth career year with 3,500 or more passing yards (3,598). Prescott is 4-0 with 11 touchdowns, including nine passing, with zero interceptions for a 118.3 rating in four career home starts against Washington. He will also be looking for his third home game in a row on SNF with a 100 or better rating. Last week against the Giants, Prescott was efficient, completing 28 of 37 passes (75.7 percent) for 217 yards and one touchdown for a rating of 98.6.

Quarterback Taylor Heinicke, who missed last week's game against the Eagles due to COVID-19, is expected back. Heinicke had a touchdown and an interception in Week 14 against the Cowboys. He needs just 69 passing yards to reach 3,000 yards for the first time in his career, and just one touchdown pass for his first season with 20 or more touchdowns. Heinicke is looking for his third road game in a row with two or more touchdowns passes and a 100 or better rating, and has 13 touchdowns, including 12 passing, vs. six interceptions for a 99 rating in six road starts in 2021.

Now, Tierney has pored over the rosters and stats and made his pick for Washington vs. Cowboys. We can tell you he's leaning Over the total, but he knows a crucial X-factor makes one side of the spread a must-back! You ABSOLUTELY need to see what it is before locking in any picks of your own.

Who wins Washington vs. Cowboys on Sunday Night Football? And which crucial X-factor makes one side of the spread hit HARD? ... Join SportsLine right now to see which side of the Washington vs. Cowboys spread to jump on Sunday, all from the Vegas insider who's 27-12-1 on Washington picks!