Overview

• Purdy was a limited participant Wednesday with toe and left shoulder injuries, and Shanahan said he has a chance to play Sunday against Arizona.
• Mac Jones would start again if Purdy is not cleared after throwing for 279 yards and three touchdowns in the Week 2 win at New Orleans.
• Shanahan left open the possibility that Purdy could dress as the emergency quarterback behind Jones and practice-squad call-up Adrian Martinez.
• San Francisco placed starting left guard Ben Bartch on injured reserve and promoted tight end Brayden Willis, with rookie Connor Colby stepping in at guard and tackle Brandon Parker added to the practice squad.
• Tight end George Kittle remains on injured reserve, while Jauan Jennings, Kyle Juszczyk, Siran Neal, Spencer Burford and Yetur Gross-Matos did not practice; Nick Bosa, Christian McCaffrey and Trent Williams had veteran rest days.