Tampa Bay Buccaneers : biggest year-to-year improvement/decline

Based on regular season win percentage:

                            Change in 
                              win %
Improvement: 2009 -> 2010     0.437   (0.188 -> 0.625)
Decline:     2005 -> 2006    -0.438   (0.688 -> 0.250)
Last Year:   2024 -> 2025    -0.117   (0.588 -> 0.471)