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.
Aside from the outside linebacker, the Giants will also be without running back Devin Singletary (groin), punter Jamie Gillan (hamstring) and wide receiver Bryce Ford-Wheaton (shoulder) for Sunday night’s clash with the Bengals.
Both receiver Isaiah Hodgins and running back Dante Miller have been elevated off the practice squad and will be active against Cincinnati.
With Gillan out, New York signed punter Matt Haack and added him to the active roster.