Cowboys' Terence Newman ruled out

IRVING, Texas -- Dallas Cowboys cornerback Terence Newman will wait at least one more week to make his season debut.

Owner and general manager Jerry Jones said the team is exercising extreme caution with Newman as he recovers from a strained groin suffered Aug. 3. Newman has not practiced since suffering the injury, although he is sprinting and cutting hard during rehabilitation sessions.

"Terence has to have it just right," Jones said. "It isn't just right. Hopefully, it could be there next week. What we're doing is being ultraconservative because he had something similar to this [three] years ago, and we thought we got him back there a little quick, so we're being ultrasensitive. If this were the Super Bowl this weekend, he'd be playing."

Newman strained his groin early in the 2008 training camp and returned for the second game of the season. After playing three games, Newman underwent surgery to repair a sports hernia and was sidelined for five weeks.

Also, wide receiver Dez Bryant has not practiced this week due to a bruised quadriceps, but Jones said he expects Bryant to play Sunday against the San Francisco 49ers.

Rookie left guard Bill Nagy (neck) was not at Thursday's practice during the early portion open to the media. There is the possibility that the Cowboys could opt to replace Nagy with veteran Derrick Dockery regardless of injury.

The Cowboys won't rush Newman, who turned 33 earlier this month, despite cornerback Orlando Scandrick being sidelined for an indefinite period with a high ankle sprain. The front office, coaching staff and medical staff have determined that it isn't worth risking Newman aggravating the injury or having it linger throughout the season.

"We're giving it extra time," Jones said. "The facts are he could go, but with the experience that we've had with him one time before in an area similar to this of injury, we've decided not to push it. He would go if we asked him to go, but we're just using the experience that we've had with him."

Tim MacMahon covers the Cowboys for ESPNDallas.com.