At first it was said that the Chargers would release veteran linebacker Stephen Cooper on Tuesday, but now Kevin Acee of the San Diego Union-Tribune reports that Cooper has will be placed on injured reserve with a torn right biceps.
Veteran linebacker Gerald Hayes has agreed to terms to replace Cooper on the 53-man roster.
The 30-year-old Hayes was a third-round pick out of Pittsburgh by the Arizona Cardinals in 2003. In 94 games over the last eight seasons, Hayes has 428 tackles, 5.5 quarterback sacks and four interceptions.
Hayes missed the entire 2005 season with a knee injury and opened the 2010 season on the physically unable to perform list after undergoing back surgery. The Cardinals released Hayes prior to training camp.
Cooper, 32, has spent his entire nine-year career with the Chargers, who signed the University of Maine product as an undrafted free agent in 2003. In 125 games, and 63 starts, Cooper has 502 tackles, 9.5 quarterback sacks and eight interceptions.
Re-signed on a one-year deal on August 12, Cooper has been playing despite tearing his right biceps during the preseason. In five games this season, Cooper has made one tackle.