Here’s a look at the teams that had the single biggest improvements in NFL history:
Year: 1999; Team: Colts; Record: 13-3-0; Previous: 3-13-0; Increase: +10
Year: 1929; Team: Giants; Record: 13-1-1; Previous: 4-7-2; Increase: +9
Year: 1963; Team: Raiders; Record: 10-4-0; Previous: 1-13-0; Increase: +9
Year: 1999; Team: Rams; Record: 13-3-0; Previous: 4-12-0; Increase: +9
Year: 2004; Team: Steelers; Record: 15-1-0; Previous: 6-10-0; Increase: +9
Year: 2008; Team: Dolphins; Record: 9-5-0; Previous: 1-15-0; Increase: +8*
* Through Week 15