IRVING, Texas -- Miles Austin is not practicing again, which is a sign he will not play Sunday at Arizona because of a hamstring injury.

Austin was riding the stationary bike during the portion of practice open to the media, as was fullback Tony Fiammetta, who will miss his third straight game with an illness. Backup nose tackle Josh Brent (knee), running back Phillip Tanner (hamstring) and quarterback Jon Kitna (back) were also missing from practice.

The Cowboys are being cautious with Austin because he has injured both hamstrings during the season. He missed two games this year and a portion of training camp because of a left hamstring injury. He hurt his right hamstring against Seattle on Nov. 6.