Steve Young's 1992 season marks the earliest season on this list. In his age-31 campaign, the veteran passer threw for 3,465 yards, 25 touchdowns and 7 picks.

With league-high 8.12 ANY/A, the southpaw completed 66.67% of his passes for a passer rating of 107. The 49ers followed him to a 14-2 regular season record and an appearance in the NFC playoffs, where their season came to an end in the conference championship.