IRVING, Texas - Three days before their regular-season opener, the Cowboys learned wide receiver Terry Glenn's problematic right knee will force him to miss the entire 2007 season, team owner and general manager Jerry Jones said late Thursday afternoon. Jones said Glenn's knee injury is similar to that of former Cowboys center Al Johnson, who missed his entire rookie season in 2003 following microfracture surgery. "You hate to see this with one of your top players and we need all of those we can beyond the field," Jones said. ""It's a real blow for Terry and for us."