Jimmy Garoppolo injury: 49ers to sign QB Josh Johnson as Brock Purdy's new backup - DraftKings Network
What the emergency-QB rule means for the Colts
The NFL's emergency quarterback rule, explained
49ers remain undecided on backup quarterback headed into exhibition finale - CBS San Francisco
NFL with no quarterbacks? The league's Covid-19 problems are just starting, Denver Broncos
49ers, Kyle Shanahan have best kind of QB problem
NFL owners pass proposal to allow teams to have third QB active on game days without using roster spot
Emergency quarterbacks for all 32 NFL teams -- Punters, high school QBs and more - ESPN
49ers in great shape at QB, but here's how they could screw it up
NFL's emergency QB rule effect on Cowboys Will Grier roster decision - Blogging The Boys
49ers QB situation with Sam Darnold getting out of control