2021 Harris Football Almanac - Aug 13, PDF, Reason
49ers' abundance of retired numbers added to laundry list of problems – NBC Sports Bay Area & California
49ers' Christian McCaffrey didn't ask for No. 21 out of respect for Frank Gore
49ers news: Christian McCaffrey said he has too much respect to wear Frank Gore's #21 jersey - Niners Nation
Roger Craig (American football) - Wikipedia
2017 Dallas Cowboys Fantasy Football Primer ✭ Inside The Star
Jim Harbaugh San Francisco 49ers: 10 Changes He'll Implement Immediately, News, Scores, Highlights, Stats, and Rumors
Sports World Reacts to Frank Gore Retiring With 49ers
49ers jersey in Canada - Kijiji Canada
49ers Foam Finger Number 1 Fan Sticker for Sale by RoyaltyWearTees