The San Francisco 49ers have been also-rans for the past four seasons, finishing with double-digit losses in each. They were 4-12 in 2018 and wound up with the second pick in the 2019 NFL Draft, which turned into Nick Bosa. The Niners won 13 games in the regular season, an improvement of nine over last year. Others have won 10 more from one year to the next but none have won the Super Bowl. San Francisco has put itself in position for one of the most astounding turnarounds in league history in the Super Bowl era.
1975 Colts: From 2-12 to 10-4
The 1974 Colts saw a pair of coaches, Howard Schnellenberger (0-3) and Joe Thomas (2-9). They flipped to Ted Marchibroda the next season and saw improvement. The Colts started 1-4 before finishing the season on a nine-game winning streak. The season ended with a 28-10 loss to the Steelers in a Divisional round game.