NEW YORK (CBSNewYork) — This one will hurt.

The Giants have won three straight to climb to the top of the NFC East, but will be without top cover cornerback Prince Amukamara for a while, head coach Tom Coughlin announced Thursday.

Amukamara may miss up to a month after suffering a partial pectoral tear during the Giants’ win over San Francisco on Sunday night.

That’s not good news for the Giants’ brutal pass defense, which is allowing an NFL-high 304 yards per game.

“It’s most unfortunate. (Amukamara) has made a lot of plays for us this fall. We’ll continue on and we will get him back,” Coughlin said.

Amukamara, who has 32 tackles, an interception and a forced fumble this season, joins a who’s who list of injured Big Blue stars, including wide receivers Odell Beckham Jr.and Victor Cruz, and defensive lineman Jason Pierre-Paul.

Beckham is questionable for Monday night’s game at Philadelphia due to a hamstring injury and Cruz is still sidelined by a calf problem that has rendered him inactive all season. Pierre-Paul’s status remains in limbo following his fireworks accident over the summer.

With Amukamara out, the Giants will likely turn to former third-round pick Jayron Hosley, Coughlin said.

Injuries have been a problem for the Giants for several seasons. Coughlin said the team will continue to shoulder on and other players will just have to step up and make the most of their opportunities.

“Some of these soft-tissue injuries are very troublesome, occurring in games, if you will, and then being so long in trying to get people back. I’m not going to get frustrated by it, but it is very bothersome,” Coughlin said.