The Cincinnati Bengals placed defensive tackle Pat Sims on the reserve/physically unable to perform list while reducing their roster to the required 53-man limit on Friday.

The Bengals waived 18 players, including third-year linebacker Roddrick Muckelroy, a fourth-round pick by the team in the 2010 draft. Rookie safety Tony Dye was placed on injured reserve among the cuts, while defensive tackle Nick Hayden was waived with an injury settlement.

In addition, linebacker Dontay Moch was put on the reserve/suspended list after receiving a four-game ban by the NFL for violating the league's policy on performance-enhancing substances.

Sims, a key member of Cincinnati's defensive tackle rotation who's started 23 games over his four-year career, has been sidelined with a hamstring injury throughout camp. The 2008 third-round pick also ended last season on IR after tearing ligaments in his ankle.

Under the reserve/PUP rules, Sims won't be eligible to practice until after Week 6 of the upcoming season.

Along with Muckelroy, who sat out all of last season with a torn Achilles tendon, Cincinnati waived fullbacks Jourdan Brooks and James Develin, tight end Colin Cochart, long snapper Bryce Davis, defensive ends DeQuin Evans and Micah Johnson, wide receiver Vidal Hazelton, cornerbacks T.J. Heath and Chris Lewis-Harris, running back Dan Herron, guards Otis Hudson and Reggie Stephens, linebackers Grant Hunter and Emmanuel Lamur, defensive tackle Vaughn Meatoga, offensive tackle Matthew O'Donnell and quarterback Zac Robinson.

Herron was a sixth-round pick of the Bengals in this past April's draft out of Ohio State.