I don’t think there is an organization in football that has had more turnover more frequently than has the Cleveland Browns. Their front office, their coaching staff, and their roster have been turned over several times over the course of just the past five or six years, even down to the owner of the team relatively recently.
They are currently on their fourth different head coach over the past three seasons, if you include the half a season that Gregg Williams spent as interim head coach in 2018. Freddie Kitchens, who was the interim offensive coordinator under him that year, was promoted to head coach for 2019.