"The Giants offensive line continues to undergo changes based on players' inability to stay on the field.

Their latest malady doesn't appear to be clearing up any time soon; center David Baas missed the 38-35 loss to the Packers on Sunday with what the team described as "headaches'' that cropped up just hours before kickoff.

Baas remains out and is undergoing tests.

"It's much more serious than headaches, obviously,'' coach Tom Coughlin said Wednesday.

Coughlin did not want to elaborate when asked if the health issue is more of an illness and added he really doesn't know the full extent of the problem. Baas is also listed as having an issue with his neck. He missed games earlier this season, first with a neck burner, later with a knee injury. Baas is listed on the injury report as "neck/intense headaches.""