Howell (wrist) was placed on injured reserve by the Bengals on Tuesday.
Howell suffered a right wrist injury during Sunday's overtime win against the Titans, and he will now be forced to miss at least four contests as a result. The defensive lineman has already undergone surgery, per Mike Petraglia of CLNSCincy.com, and in Howell's absence, Shemar Stewart will stand to see an increase in workload at defensive end.