Bill O'Brien knows who will start at quarterback.
He also knows the other two signal-callers will hit the field as well.
But he just doesn't know much each of the three will play.
"You have no idea how the game's going to play out," O'Brien said Monday. "'How long is this drive? How long is that drive.' You have to play it by ear relative to how the game goes. But all three quarterbacks will play in the game."
O'Brien said Tom Savage will start, and Deshaun Watson and DeAndre Hopkins will also play.
Savage is excited about the opportunity.
"It's important," Savage said. "Every time we strap those pads on and go out there it's important. It's going to be a good test for us to go out there against a live opponent, and it's going to feel good to get hit."
Kickoff is 6:30 p.m. CT on ABC-13/KTRK and SportsRadio 610 in Houston. HERE is a complete list of the Texans television and radio affiliates throughout the state and beyond.