It's tough to win six games in a row.

It's even tougher to do so after losing the first three games of the season.

After Sunday's 19-17 victory at Denver, Houston is 6-3 in 2018. The 1970 New York Giants are the only other team in the Super Bowl era to begin a campaign with a 3-game skid, only to win their next six.

"To go from 0-3 to 6-3 is very difficult to do," defensive end J.J. Watt said. "But we believed in each other."

After their loss to the Giants in Week 3, Houston was minus-2 in turnover differential. In the six games since, they've been plus-6, and are now at plus-4 on the season. It's one key component of a turnaround that, according to receiver DeAndre Hopkins, is rooted in mental strength.

The All-Pro pass-catcher was asked if the Texans' mentality changed during the winning streak, and he was definitive in his answer.

"Nah," Hopkins, who finished with 10 catches for 105 yards and a touchdown, said. "We've got the same mentality. And that's 'win'. That's the same mentality we had when we were 0-3."

Watt finished with a sack, a tackle for loss and three quarterback hits at Denver. He expanded on Hopkins explanation of the team's mentality, which has propelled the Texans from the cellar of the AFC South in late September, to the top of it now in early November.

"There's a belief," defensive end J.J. Watt said. "We know we're going to find a way to get it done. We don't know who's going to make the play. We don't know where the play's going to come from."

The Texans are off next Sunday, and return to action in two weeks at Washington.