"I don't think they're talking about some of us going to play on Sunday," Romo said after Friday's practice. "It's whatever Coach tells you (to do). They know what's best for our football team."
Multiple sources said Romo won't play in the Hall of Fame game.
When asked again if he would play, Romo said, "I don't think so."
Romo lobbied to play in the game, but coach Jason Garrett decided to go with the backups.
Among the reasons some starters won't play the first of five preseason games is that the Cowboys have a leaky offensive line that hasn't gained enough continuity because of injuries to the starting guards.
On Tuesday, Romo convinced Garrett to not give him a day off and let him practice in short yardage and red zone team drills.
Cowboys officials say the minor back surgery Romo had in the spring has no bearing on this decision.
Romo is moving around fine during training camp practices with most of his passes being tight spirals.
The Cowboys also could sit defensive end DeMarcus Ware, who is coming off shoulder surgery, running back DeMarco Murray and wide receiver Dez Bryant, who missed four days of practices with a sore hip and quad.
Bryant returned to practice Thursday.