12. Chris Doyle
Doyle began coaching college football in the nineties in strength and conditioning. He worked with the Iowa Hawkeyes before his actions cost him his job. Doyle used racially charged language toward his athletes as he threatened to send them back to the ghetto (via Bleacher Report).
Furthermore, he was critical of how black players styled their hair. Iowa fired him because this was unacceptable in the 21st century. But Urban Meyer thought that he was a perfect fit for the Jaguars. Somehow he made it through vetting but the media picked up on his unsavory track record of alleged racism. He quit after a day on the job.