Nate Sudfeld and Brock Purdy are both impressing the 49ers, so who'll be QB2? - The Athletic
NFL Preseason odds: 49ers-Vikings prediction, odds and pick
49ers are keeping rookie Brock Purdy, cutting Nate Sudfeld - NBC Sports
49ers Practice with Vikings in Preparation for their Preseason Matchup
Sudfeld, 49ers beat Vikings 17-7 in battle of backups - ABC7 San Francisco
49ers' Kittle glad he won't have final say on QB battle between Garoppolo, Lance: 'It's a toss-up for me'
49ers/Vikings preseason: Which player will be on your radar for the second preseason game? - Niners Nation
Are the Bengals or 49ers a better team right now? - Quora
Can Brock Purdy Win a Championship for the 49ers?
49ers' offseason program: Keys include QB questions, new faces