The Giants will be without one of their key defensive pieces for at least four weeks.

Big Blue placed Kayvon Thibodeaux on injured reserve on Saturday after he suffered a wrist injury against the Seahawks last week.

Thibodeaux underwent surgery earlier this week for what NFL Network reported was a fractured scaphoid bone in his wrist.

The surgery was not expected to be season-ending.

Head coach Brian Daboll told reporters Wednesday that Thibodeaux was expected to be week-to-week.

Thibodeaux, 23, had 12 tackles and two sacks through the Giants’ first five games.

The Giants this time around are not going to go into a game with an injured specialist. On Saturday, they signed Matt Haack and he will be their punter for Sunday night’s game with the Bengals. Jamie Gillan hurt his left hamstring during practice on Friday, an injury that will keep him out of this game.

Haack, 30, spent four seasons with the Dolphins and has also punted for the Bills, Colts and Browns. He was in Buffalo in 2021 with Daboll and general manager Joe Schoen. Haack has appeared in 99 NFL games.

Placing Thibodeaux on IR opened up room on the roster for the move.

RB Devin Singletary (groin) was downgraded to out and will miss his second consecutive game. WR/special teamer Bryce Ford-Wheaton (shoulder) was also ruled out. … WR Isaiah Hodgins and RB Dante Miller were elevated from the practice squad.

New week, same challenge.

That about sums up the life of the top cornerback on a roster. For the Giants, it is Deonte Banks. The 23-year old already has faced Justin Jefferson, Terry McLaurin, Amari Cooper, CeeDee Lamb and DK Metcalf in the first five weeks of this season.

The results have been mixed, but Banks is coming off his finest 2024 performance — preventing Metcalf from taking over the game in last week’s 29-20 victory over the Seahawks.

There is no opportunity for a breather for a CB1, though. Next up is one of the most dangerous threats in the league, as Banks lines up across from Ja’Marr Chase when the Giants face the Bengals on Sunday night at MetLife Stadium.

“He’s got it all,’’ defensive coordinator Shane Bowen said of Chase. “The ability to separate, the ability to get open, the ability to catch the ball down the field, the ability to catch the ball short and take it the distance. He’s got it all, and he’s a problem. We got to know where he’s at on every snap, be aware of where he’s at on every snap, him and [Tee] Higgins both, but he’s a playmaker. The quarterback gets it to him and he makes plays.’’

Chase is averaging 17 yards per reception and already has five touchdowns. He has 11 career catches of 50 or more yards.

That ranks third in NFL history among players under the age of 25. Just Randy Moss (14) and Harlon Hill (12) have more. Odell Beckham Jr. had 10 for the Giants before he turned 25.

That Banks, the Giants’ 2023 first-round pick, is coming off one of the best games of his nascent NFL career is encouraging for the Giants. He limited Metcalf to four receptions for 55 yards and forced a fumble.

“I thought he was tight,’’ Bowen said. “I thought he challenged, and he got his hands on some footballs. He just continued to stay focused, play in and play out. He was up for the challenge. It was good to see him go out there and make some plays for us.’’

The Bengals (1-4) have lost to the Patriots (ugh), Chiefs, Commanders and last week’s 41-38 overtime loss to the Ravens was a real killer.

It is a rare day indeed when a quarterback throws for 392 yards and five touchdown passes and compiles a rating of 137.0 and is not the winning quarterback.

That has been Joe Burrow’s lot in life this season. It is easy to make the case that Burrow is playing at a higher level than any other NFL quarterback — his 12 touchdown passes and 113.6 rating are tops among players with five starts — but the Bengals have rarely stopped anyone, and they are in danger of falling into the abyss of non-contention.

At halftime, the Giants will honor their 2007 and 2011 Super Bowl championship teams as part of their ongoing 100th season celebration. The first 25,000 fans will receive a Tom Coughlin bobblehead.