Glenn suffered an injury to his surgically repaired right knee during Wednesday's practice. On Aug. 1, Glenn had a cyst removed from the knee and missed the entire preseason. The injury suffered Wednesday was a new injury, possibly involving cartilage.
"Unfortunately, he had another injury that was not related to
the original injury," Phillips said.
Glenn, entering his 12th season, caught 70 passes for 1,047
yards and six touchdowns last year and gave the Cowboys a deep
threat that helped Terrell Owens lead the NFL with 13 touchdowns.
"It's a blow not to have him for this ball game, but there are
no excuses,'' Phillips said. "We're not crybabies. No crying in
Glenn is expected to miss at least two weeks, but the tests will determine exactly how long he will be out. Patrick Crayton, who has filled in for Glenn during the preseason, will get the start on the other side of Terrell Owens.
Crayton, who has 1,019 yards and seven touchdowns in three seasons, will move into Glenn's No. 2 role behind Owens. Sam Hurd will be the third receiver.
"Patrick Crayton is very dependable,'' Phillips said. "He's a
very heady player. He always finds a way to get open.''
Phillips said it would be a gametime decision on whether cornerback Terence Newman will be able to play with his plantar fascia foot injury.
Jacques Reeves will start if Newman can't. Reeves has started
one game in three seasons.
Outside linebacker Greg Ellis, who is trying to come back from a ruptured Achilles' heel, isn't expected to play against the Giants.
If he doesn't, first-round pick Anthony Spencer will start in his
Linebacker Kevin Burnett returned to practice Thursday. He is recovering from ankle surgery.
Senior writer John Clayton covers the NFL for ESPN.com. The Associated Press contributed to this report.