Injuries continue to pile up and threaten to sap the depth along the New York Giants' defensive line. --Defensive tackle Shaun Rogers is being treated for a blood clot in his lower leg, and coach Tom Coughlin said Tuesday that Rogers' season is over, according to the New York Daily News. He played in 16 games last year, including four starts. --Defensive tackle Martin Parker has a herniated disc in his back, which will require surgery and he will miss his second straight season. --Defensive end Justin Trattou, who has been sidelined with a sprained ankle, has been experiencing issues with his heel and is not expected back on the field for several weeks, according to the team. --Defensive tackle Marvin Austin was being examined Tuesday at the Hospital for Special Surgery for a back issue. Austin missed last year, his rookie season, with a torn pectoral muscle. --Defensive tackle Chris Canty remains on the physically unable to perform list.