Houston Texans : biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2013 -> 2014     0.438   (0.125 -> 0.563)
Decline:     2012 -> 2013    -0.625   (0.750 -> 0.125)
Last Year:   2024 -> 2025     0.118   (0.588 -> 0.706)