Don't ever hire a lawyer.
.....or a plumber, car mechanic, doctor, electrician,.....
If Jerry Jones bought a five star restaurant, he'd make himself the Head Chef. When the real chefs disagreed with his culinary choices it would be time for them to go. Hopefully, they wouldn't get stampeded by the customers on their way out the door.
It was Jerry himself who said in 1989 that "Nobody can own the Dallas Cowboys". He claimed that the team belonged to the fans and he was merely a "caretaker".A professional team is a partnership between the owner and the host city or region. If the city in which the Cowboys operate ever decided to terminate their agreement then Jerry would have to negotiate with a different city. Does this mean Jerry is an employee of the city?
The team's business relationships go far beyond that of employer/employee. When it involves a contract, the proper definition would be that of an individual contractor. Head coaches are offering their services on a limited basis and under specific terms. these terms can be in the contract and therefore enforceable. They can be verbal in which case, one way to resolve the dispute is to end the relationship.
Jimmy wasn't fired. He didn't "walk away". Jerry Jones admitted partial fault by way of a separation agreement that paid Jimmy a lot of money. Employers don't do that for employees.
When it came to what they were there to do, every single coach hired by the Cowboys were better than Jerry Jones.