7. Jeffrey Loria – Miami Marlins
The definition of a snake oil salesman, Loria’s ownership of the Marlins has been horrendous. After winning the World Series in 2003, he oversaw a complete overhaul of his roster. He did everything he could to increase his bottom line, totally gutting the team. The results reflected his actions.

In the late 2000s, he went full oligarch and held the city hostage for a new stadium. He pulled the classic tactic of threatening to relocate if they didn’t pay. Ultimately they succumbed to his demands and funded the majority of the construction. He even lied and told Jose Reyes to buy a house in Miami four days before sending him to Canada.