49ers place CJ West on IR with knee injury, sign two D

Key Points:

• The San Francisco 49ers placed defensive tackle CJ West on injured reserve due to a bone chip in his knee, requiring surgery, but he is expected to return later in the season.
• To fill West’s spot, the 49ers signed defensive tackle Naquan Jones from the Minnesota Vikings' practice squad; Jones has experience with multiple NFL teams over five seasons.
• The 49ers’ injury list is growing, with several players including wide receivers Demarcus Robinson, Ricky Pearsall, De’Zhaun Stribling, and Christian Kirk, as well as tight end Jake Tonges and defensive linemen Alfred Collins and Sam Okuayinonu already on injured reserve.
• Robinson and undrafted rookie James Thompson Jr. are likely to be placed on injured reserve due to high ankle sprains, potentially sidelining them for at least four games.
• The team added veteran wide receiver Brandin Cooks and defensive lineman Viliami Fehoko Jr. to the practice squad while releasing cornerback Jakob Robinson.