The Cowboys announced Tuesday that Terry Glenn will undergo arthroscopic knee surgery. Glenn, 33, suffered the injury Sunday and has not practiced since. An MRI came back negative, but the 12-year veteran does have a tiny cyst on the back of his knee cap. Team owner and GM Jerry Jones said the surgery is scheduled for Tuesday and that Glenn will likely miss two weeks. Glenn should be ready when the Cowboys open the season at home vs. NFC East rival Giants on September 9.