NFL playoffs: 49ers' Brock Purdy joins Joe Montana, Steve Young in rare club after historic postseason debut | CBS Sports Headlines NFL playoffs: 49ers' Brock Purdy joins Joe Montana, Steve Young in rare club after historic postseason debut Purdy surpasses Dan Marino as the youngest QB with 300 passing yards … Continue reading NFL playoffs: 49ers' Brock Purdy joins Joe Montana, Steve Young in rare club after historic postseason debut