28. Mark Mornhinweg
Mornhinweg had maintained a long career in the NFL as an offensive coordinator. Somehow he managed to get the Detroit Lions head coach job in 2001 even though he seemed underqualified. The Lions are used to disastrous coaches but Mornhinweg was especially bad. They went 2-14 in his first year before improving to 3-13 the following (via Gainesville Sun).

The Lions ended this miserable experiment after that second torrid year. One of his worst accolades was going 0-16 on the road across two seasons. Bear in mind, Mornhinweg took over a winning team that narrowly missed out on the playoffs. He ensured they’d fall massively short of success throughout his tenure. The Lions are exceptional at being terrible.