It was thought Umenyiora would play after he was limited in Friday's practice and listed as questionable by the team. Umenyiora has missed the last four games with a high ankle sprain.
The Giants deactivated wide receiver Ramses Barden, linebacker Mark Herzlich, center Jim Cordle, defensive end Justin Trattou, defensive tackle Jimmy Kennedy, tackle James Brewer and tight end Jake Ballard.
Cowboys quarterback Tony Romo took the field for pregame warm ups with no padding or support on his bruised right hand, according to NFL.com's Steve Wyche. A team official told Wyche Sunday morning that there are no concerns about Romo's hand, injured last week.
The Cowboys ruled out wide receiver Andre Holmes, cornerback Frank Walker, safety Danny McCray, fullback Shaun Chapas, guard David Arkin, defensive end Clifton Geathers and defensive tackle Chris Griesen.