A former second-round draft pick of the Washington Redskins, Thomas is the second receiver signed by the Giants this week. They signed former Tampa Bay Buccaneers wideout Michael Clayton on Tuesday, one day after leading receiver Hakeem Nicks had an emergency procedure to relieve pressure in his right leg.
To make roster room for Thomas on Wednesday, the Giants placed fullback Madison Hedgecock on season-ending injured reserve. He has been sidelined since suffering a hamstring injury against the Chicago Bears in early October.
Thomas has 40 catches for 445 yards and three touchdowns in 35 career games.
Defensive end Justin Tuck, who had a career-best three sacks Sunday against the Philadelphia Eagles, also sat out because of a quad injury, but he expects to play Sunday against the Jacksonville Jaguars.
"He's optimistic about a speedy recovery," Coughlin said.
Tight end Jake Ballard and defensive back Woodny Turenne were signed to the Giants' practice squad.
Ballard was signed to the active roster Saturday. He played as an extra tight end in Philadelphia and was waived after the Giants signed Clayton on Tuesday.
Copyright 2010 by The Associated Press