McCaffrey, Shanahan football family trees go back to 1994
49ers give contract extensions to coach Kyle Shanahan and GM John Lynch
Mike Shanahan's Ring of Fame Broncos career in photos
Christian McCaffrey 'fired up' to join San Francisco 49ers
Kyle Shanahan's relationship with Christian McCaffrey comes full-circle – NBC Sports Bay Area & California
49ers news: Breaking down the Shanahan coaching tree and offense - Niners Nation
The McCaffrey and Shanahan Family Connection
Where does Christian McCaffrey get his speed? From mom, who once ran a 4.8 40 … pregnant - The Athletic
The Life And Career Of Ed McCaffrey (Complete Story)