The San Francisco 49ers waived defensive lineman Datone Jones Tuesday, one day after adding defensive tackle Sheldon Day off waivers from the Jacksonville Jaguars. The 49ers had a roster spot open when they added Day but needed to open another one up for when they return defensive end Tank Carradine from injured reserve. Carradine was sidelined following the Week 3 loss to the Rams with a high ankle sprain.