Tom Brady played six seasons after turning 40 years old. He turned 40 on August 3, 2017, during his 18th NFL season, and continued playing through the 2022 season, when he was 45.
Those six seasons were 2017 through 2022. Brady played for the New England Patriots in 2017, 2018, and 2019, then joined the Tampa Bay Buccaneers for 2020, 2021, and 2022. The stretch included three Super Bowl appearances and two victories: New England won Super Bowl LIII after the 2018 season, while Tampa Bay won Super Bowl LV after the 2020 season.
A common counting mistake is to begin with 2018 because Brady was already 40 when the 2017 season began. However, he turned 40 during that season and played several games afterward, so 2017 counts. Another mix-up is counting calendar years rather than NFL seasons; by the end of the 2022 season, Brady had completed exactly six seasons in which he played after reaching age 40.