Dallas Cowboys
‘America’s Team’ was the best franchise of the ’90s but it’s been all downhill from there. Bill Parcells is one of their all-time greats and revitalized the franchise in his second spell. But Mike McCarthy deserves credit because he overcame adversity to bring them back into contention (via USA Today Sports).

It’s easy to identify their worst coach though because he’s the only one in franchise history with a losing record. Dave Campo went 15-33 as he ran the Cowboys into the ground. Nobody knows how he managed to stay with them for so long but he did a terrible job. It made Parcell’s job look even better.