Who is the Ravens' backup quarterback? Baltimore's 2025 QB depth chart behind Lamar Jackson
Perhaps most notably, Johnson was thrust into a big role as the 49ers backup quarterback during the 2023 NFC Championship Game. After Brock Purdy went down with an arm injury, the then-36-year-old Johnson stepped onto the field for his first-ever playoff action, going 7-of-13 for 74 yards before he was forced to exit the game with a concussion.