FRISCO, Texas – The Cowboys are now preparing themselves to be without Randy Gregory for longer than just the first four games.

The second-year defensive end, who is already facing a suspension from the NFL for violating the league's substance abuse policy, has now entered a drug rehabilitation. According to multiple reports, Gregory could be facing a much longer suspension if he again violated the NFL's drug policy.

Although head coach Jason Garrett repeatedly did not comment on Gregory's status for the season, or even for the start of training camp this week in Oxnard, Calif., it doesn't appear he will be joining the team anytime soon.

"I don't want to comment on that," Garrett said Tuesday at a coach's clinic in Arlington. "I'm not commenting on Randy Gregory."

Gregory was already suspended the first four games but now it could be pushed to as many as 10 for this year. The Cowboys already have linebacker Rolando McClain serving a 10-game suspension and DeMarcus Lawrence will miss the first four – both for violating the substance abuse policy as well.[embeddedad0]

The Cowboys leave for training camp on Thursday but the first practice is scheduled for Saturday in Oxnard.

Before this latest setback, Gregory was eligible to practice with the team in training camp and participate in all preseason games, but would then revert to a suspended list once the roster was trimmed down to 53 players.

However now, Gregory's status to rejoin the team is unclear. Gregory had been working with the first-team defense at defensive end, opposite Lawrence, who is expected to practice at training camp before his suspension.