On Sunday night, for the fourth time in their past six games, the Vikings scored a touchdown on their first drive, stringing together an eight-play, 75-yard march they hoped would put Cowboys rookie quarterback Cooper Rush in a vise grip.
Kirk Cousins scrambled for 6 yards when a game-opening play-action pass didn't materialize. Offensive coordinator Klint Kubiak motioned Adam Thielen into a trips set on third down, leaving Tyler Conklin split wide for a one-on-one matchup and a 31-yard gain against former Vikings safety Jayron Kearse. Cousins dropped back on four of the Vikings' first six plays; one of his two handoffs was to Justin Jefferson for a downfield pass attempt to Thielen. And on a second-and-11, the Vikings set Thielen up like he was blocking a Jefferson screen for the second time on the drive, before he disengaged from Trevon Diggs and found plenty of space for a Cousins touchdown pass in the middle of a Cowboys defense that had been fooled by the screen.
The Vikings were aggressive and creative in the opening series, and they would have gone up 14-0 if Jefferson hadn't misjudged a deep ball from Cousins on their second series.
Then, suddenly, their offense dried up.
Like most teams, the Vikings script their first 15 plays of the game, and first-year offensive coordinator Kubiak's work has shone in those spots. What happens to the offense after that has been a mystery that's perplexed the Vikings for much of the season.
After the Vikings needed a comeback to defeat the winless Lions on Oct. 10, coach Mike Zimmer directed his offensive staff to do a self-study before the Vikings' next game, moving the traditional bye-week activity up by seven days. Cousins threw for 373 yards in the next week's overtime win against the Panthers, but on Sunday night, the quarterback was at the helm of an offense that has rarely appeared more tentative.
Cousins threw seven passes that traveled 10 or more yards downfield, according to NFL Next Gen Stats. He threw 11 behind the line of scrimmage, completing nine of them. His average throw Sunday night was 5.2 yards short of the first-down marker — the shortest in the league. The Vikings went 1-for-13 on third downs, which was the worst conversion rate in the league this season; after hitting Conklin on the game's opening possession, Cousins threw short of the sticks on his final eight third-down attempts of the 20-16 loss.
"That's never part of the game plan going in," wide receiver Thielen said of the short throws. "That's just what the play call is and then, I don't know. Again, you've got to look at the tape. There's so many factors, right? It could be pressure, it could be guys not getting open, myself included. There's so many factors that lead into that, why a quarterback throws a checkdown."