Bitter rivals looking for a fast start in the ultra-competitive NFC East meet when the Dallas Cowboys visit the Washington Redskins. Sunday's kickoff from FedEx Field is set for 1 p.m. ET. Dallas is a 5.5-point favorite, with the Over-Under set at 46.5.

Before you make any Cowboys vs. Redskins picks, see what famed pro football expert Mike Tierney has to say.  

A renowned sportswriter whose work appears in the New York Times and Los Angeles Times, Tierney has reported from seven Super Bowls. Tierney was all over the Patriots in the 2019 Super Bowl, enabling him to finish the season with a sparkling 63-46 record against the spread. Anyone who has followed him is WAY up.

Now, with the NFL season gaining steam, Tierney has evaluated Cowboys vs. Redskins from every angle and locked in his pick. We can tell you he's leaning under, but he's isolated a critical X-factor that has him going BIG on one side of the spread! You ABSOLUTELY need to see it before locking in any of your own.

Who wins Cowboys vs. Redskins? And what critical X-factor makes one side of the spread hit HARD? ... Join SportsLine right now to see which side of the Cowboys vs. Redskins spread you should jump on Sunday, all from the incomparable expert who went 63-46 on against the spread picks last season!