Mike McCarthy posted a 125-77-2 record during his 13 seasons as head coach of the Green Bay Packers from 2006 through the middle of the 2018 season, but the team chose to make him available earlier. That is, they fired him.
The Cleveland Browns happen to be another team that fired their head coach mid-stream this season, deposing Hue Jackson after two-plus seasons in which he won a whopping four games, plus a tie. Jackson has already found another job as a Special Assistant with the Cincinnati Bengals, for whom he has previously worked on a number of occasions.