Crocker tore the anterior cruciate ligament during a 49-31 loss to Buffalo on Sunday. Rucker suffered a knee injury a week earlier and was inactive against the Bills.
The Bengals signed free agent cornerback Jonathan Wade, who played in eight games for Detroit this season. He was released on Nov. 10. They also put defensive end Antwan Odom on the roster again. Odom had a one-week roster exemption after serving a four-game suspension for violating the league's ban on performance-enhancing drugs.
Copyright 2010 by The Associated Press