The Giants lost another key player Saturday when cornerback Aaron Ross was placed on season-ending injured reserve with a back issue.

Ross started the past two games in place of injured Corey Webster and without him the Giants take a hit to their depth on defense. Down to just three healthy cornerbacks they signed rookie Charles James off the practice squad and James is set to make his NFL debut Sunday against the Eagles.

Ross was forced out of last week’s loss in Kansas City with a back issue. Originally a 2007 first-round pick of the Giants Ross started on two Super Bowl-winning defenses before spending last season with the Jaguars.

James is a small (5-foot-9 179 pounds) quick corner out of Charleston Southern who impressed the Giants in the summer.

Prince Amukamara is healthy as one starting cornerback spot and Trumaine McBride could make his first start for the Giants with Terrell Thomas serving as the nickel back or those roles could be reversed.

McBride is with his fourth team in his sixth NFL season and has 10 starts on his resume. The Giants have been building up Thomas’ reps steadily as he returns from two ACL knee surgeries in the past year.

In other roster moves safety Will Hill was added to the active roster after missing the first four games sitting out a suspension for violating the league’s drug policy. Offensive lineman Dallas Reynolds signed last week was waived.