The Dallas Cowboys have asked receiver Terry Glenn to sign a $500,000 injury settlement -- relieving them of any further obligation if the veteran receiver is sidelined for the season due to his surgically repaired right knee, according to the Dallas Star-Telegram.

If Glenn were to get injured without the waiver, the team would be on the hook for his entire 2008 salary of $1.74 million, the article written by Clarence Hill states.

So far, Glenn has declined to sign the waiver and has not been allowed to participate in the "organized team activity" workouts the past two weeks.

The Cowboys apparently are not as confident in his recovery and rehab.

Glenn missed 15 games last season after undergoing two arthroscopic knee surgeries.

The article says that the Cowboys doctors believe Glenn needs microfracture surgery to fully repair the injury. But because microfracture surgery would require him to miss the entire season and likely end his career, Glenn has opted to strengthen the knee through rehabilitation and weight training.

He had no setbacks when he returned to play in the season final last season and in the playoff loss to the Giants.

The knee has not given him in any problems during the off-season.