Randy Gregory, David Irving miss practice, expected to play

Cowboys defensive end Randy Gregory (94) on the sidelines in the first half at Bank of America Stadium.Bob Donnan-USA TODAY Sports

Cowboys D-linemen will likely be active on Sunday versus Texans.

Cowboys defensive linemen Randy Gregory and David Irving both missed practice on Thursday, both with non-injury-related absences, but apparently both were excused by the team.

The Dallas Morning News is reporting that Jerry Jones said he expects Irving to play on Sunday. Irving is in his first week back at practice after serving a four-game suspension for violating the NFL's substance-abuse policy. He missed training camp while dealing with personal issues and came back to headquarters a couple of weeks ago for approved workouts on his own.

Gregory missed practice as part of his ongoing treatment plan that was setup due to his many infractions of the substance-abuse policy.

WR Terrance Williams missed his third straight practice. His absences on Friday and Wednesday were termed "non-injury related," but on Thursday the injury report listed him with a foot injury.