Cowboys owner Jerry Jones said Friday that the team was waiving Glenn, but didn't rule out the possibility of the veteran receiver returning later if he's not claimed by another team.
Jones insisted that the decision wasn't about a months-long dispute with Glenn over an injury waiver that kept him from taking part in offseason workouts and would have greatly reduced his salary should he re-injure the knee and be unable to play.
"That turned out not to be an issue," Jones said as his team wrapped up its first practice of training camp. "At the end of the day it had more to do with where we are right now ... all that might have impacted how we give our young players a chance in how we evaluate that position."
Instead of wondering if and when he might be ready to play, repeating what they went through last season after Glenn was hurt in training camp, the Cowboys for now will focus on the young receivers and who will play opposite Pro Bowl receiver Terrell Owens.
Glenn missed the first 15 games last season two operations on his right knee.
Throughout the summer, Glenn refused to sign a split contract, one that would have given him only $500,000 of his $1.74 million base salary should he not be able to play because of an injured right knee.
Glenn, who turned 34 on Wednesday, had consecutive 1,000-yard seasons for the Cowboys before his injury last year.
While Jones knows there is the risk that Glenn may be claimed by another team, he didn't rule out the possible return of Glenn later if he's still available - and the Cowboys need him.
"My understanding is he's going to get himself ready to play and at the same time not be foolish and expose himself to injury," Jones said. "If we want to do something in the future, we'll do it on a good arm's length basis, a new deck of card as far as any business is concerned.
"As we go down the road, we'll see where we are."
'Boys Waive Glenn
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