TUCSON- Rich Rodriguez responded late Tuesday night after officials at the University of Arizona announced they were firing him.
In a tweet, Rodriguez said he was "deeply disappointed".
He said he learned by email the university was buying out his contract.
As far as the alleged workplace misconduct, Rodriguez wrote, the investigation concerned a complaint by his former administrative assistant "who threatened a $7.5 million lawsuit alleging harassment".
He said during the investigation he voluntarily took a polygraph test and passed.
Rodriguez wrote the complaint included a "single truth".
"In the past, I had a consensual, extramarital affair with a woman who is not affiliated with the University. It was wrong, and I have apologized to my wife and family. I am still working incredibly hard to repair the bonds I've broken and regain the trust of my wife and children, whom I love dearly."
He also writes the "claims by my former assistant are simply not true".
Athletic Director Dave Heeke and President Robert Robbins released a letter to the university Tuesday. Read the full letter here.