NFL's emergency QB rule effect on Cowboys Will Grier roster decision - Blogging The Boys
The NFL's emergency quarterback rule, explained
NFL approves emergency 3rd QB after 49ers' injury woes in NFC title game
Garoppolo, Purdy, Brady, oh my! 49ers' quarterback chatter is all-consuming
Purdy's success could open door for other QBs in NFL draft
49ers' Backup, Third-String, & Emergency Quarterbacks
Emergency quarterbacks for all 32 NFL teams -- Punters, high school QBs and more - ESPN
Josh Johnson injury update: 49ers' fourth-string QB exits vs. Eagles with concussion
Kyle Shanahan hasn't settled on backup QB role yet - Sactown Sports