Bengals place WR Caldwell on injured reserve
The fourth-year player saw action in 13 games this season with two starts, making 37 catches for 317 yards and three touchdowns.
To replace Caldwell, the Bengals have signed rookie receiver Armon Binns from the practice squad.
Binns originally was signed to the practice squad on Sept. 20 after signing on July 28 with Jacksonville as an undrafted free agent and being cut on Sept. 3.
Signed to the practice squad Tuesday is WR Vidal Hazelton, who like Binns attended the University of Cincinnati and is a rookie.