The 49ers wisely have some key veterans, most prominently Nick Bosa, Christian McCaffrey and Trent Williams, on schedules designed to keep them fresh and out of the fray from time to time. Quarterback Brock Purdy is a leader in a more reserved, analytical way. Deommodore Lenoir is stepping up to push the secondary.

The injury list for the San Francisco 49ers went through a bit of a shuffle with a few key players returning from injuries Tuesday while significant questions remain on several others just a week before NFL rosters will be cut to 53 players.

SANTA CLARA – Nate Sudfeld rejoined the 49ers’ quarterback ranks Tuesday, three years after Brock Purdy beat him out as a rookie for the No. 3 role and an unexpected ascent to the franchise’s throne.

Renardo Green and Isaac Guerendo were among those who returned for a practice in which Brock Purdy and Ricky Pearsall continued to connect.

San Francisco 49ers cornerback Deommodore Lenoir hilariously explained how his friendship with Chase Lucas has evolved over the years.

Sudfeld is the fourth quarterback available for Saturday’s preseason finale against the Los Angeles Chargers, with Mac Jones and Carter Bradley still slinging it alongside Purdy. Sudfeld was brought in Monday to throw to three wide receivers who were auditioning as free agents.