The Texans looked like they had perhaps the worst offense in the NFL in the first half of Week One, with Tom Savage under center. Then they benched him for Deshaun Watson, and suddenly became perhaps the best offense in the NFL.

So now that Watson is out for the season and Savage is starting again, what changes? Texans coach Bill O’Brien says plenty will change.

“Clearly there’s differences. Every quarterback is different. There’s a lot of differences, I mean, that’s obvious. I think anybody can watch a game and see the differences with any quarterback in the league,” O’Brien said.