20. Dick McPherson
For the past two decades, the Patriots have been synonymous with success. But they went through a grim period through the late 1980s and early ’90s. McPherson took the job in 1991 after he led Syracuse to four bowl games. There were high hopes that he would replicate his success at the pro level. In the beginning, it appeared he would.

They improved to 6-10 in McPherson’s first year, not the greatest record but a marked improvement from the prior year’s 1-15. Analysts regarded this as an impressive achievement considering their previous showings. But his sophomore year as an NFL head coach was disastrous. McPherson went through four quarterbacks throughout the season. None of them made a difference as the Patriots regressed to 4-12 (via Athlon Sports).