The interior of the New York Giants' defensive line is facing questions after veteran Shaun Rogers was lost for the season with a blood clot in his left calf and two other defensive tackles were diagnosed with back problems, including one that will require season-ending surgery.

Coach Tom Coughlin announced Tuesday that Rogers' treatment for the blood clot would prevent him from playing for the Super Bowl champions this season. His calf swelled after the Giants' preseason opener against Jacksonville.

Marvin Austin, the team's No. 2 draft pick in 2011, also was being seen by doctors after his back acted up Monday night. Coughlin added free agent Marvin Parker needs surgery to repair a herniated disc injured the game Friday.

The Giants do have depth at the tackle spot.

(Copyright 2012 by The Associated Press.  All Rights Reserved.)