49ers' Brock Purdy to become fifth rookie QB to start conference championship, here's how the other four fared | CBS Sports Headlines 49ers' Brock Purdy to become fifth rookie QB to start conference championship, here's how the other four fared No rookie QB has started and won a conference championship … Continue reading 49ers' Brock Purdy to become fifth rookie QB to start conference championship, here's how the other four fared