Romo sprained his right ankle during a 34-21 victory over the Tampa Bay Buccaneers. He didn't miss any snaps in the game and doesn't expect it to be an issue as he prepares to face the New York Giants on Sunday night.
"I'll be fine," he said. "There's nothing wrong with it. ... It will be 100 percent."
Jones bruised his thigh against the Bucs and returned but was limited. He played only six games as a rookie because of injuries and is expected to be a key part of the offense this season.
The Cowboys practiced at Southlake Carroll High School's indoor facility because of rainy weather. It was the first time the Cowboys have done that since their indoor facility collapsed in May.
"I didn't want anybody slipping around," coach Wade Phillips said. "I wanted to be able to come off the ball on both sides and be physical."