Bill O'Brien wasn't pleased with how the Houston Texans looked in Thursday night's season-opening loss to the Kansas City Chiefs.

The Chiefs won 34-20 as they celebrated February's Super Bowl victory.

"There's a lot to fix," O'Brien said. "We have a long way to go here obviously. We had trouble stopping the run. Our defense could not get off the field, so we got down. We have to improve very quickly this week."

The Texans' offense struggled in its first game following the DeAndre Hopkins trade. They'll face the Baltimore Ravens in Week 2.