Overview

• In their final joint practice before Saturday’s preseason opener, the Broncos’ defense dominated early sessions before the 49ers responded with late touchdowns during starter-on-starter drills.
• Rookie defensive end Mykel Williams was shaken up in red-zone drills when he fell on his left knee and is receiving further medical evaluation.
• San Francisco signed defensive tackle Michael Dwumfour before practice to reinforce its interior defensive line.
• Undrafted cornerback Jakob Robinson has been elevated to the active roster and stands to see significant playing time with Renardo Green and Deommodore Lenoir sidelined.
• Coach Kyle Shanahan plans to sit key veterans—including Brock Purdy, Christian McCaffrey, George Kittle, Trent Williams, Nick Bosa and Fred Warner—in Saturday’s preseason opener to preserve health and assess depth.