The NFC West champion Seattle Seahawks have placed linebacker Jamie Sharper on injured reserve, ending his season. Sharper, a nine-year veteran who signed with the Seahawks as a free agent in April, started the first eight games this season before being sidelined by a staph infection in his right knee. The Seahawks replaced Sharper on the roster by activating cornerback Mike Harden from the practice squad. Sharper signed a $17.5 million, five-year contract, with a $1.5 million signing bonus with Seattle after being released by the Houston Texans. He was with the Texans for three seasons after playing five seasons with Baltimore.