Chiefs Chairman Clark Hunt will assume CEO duties.
"I have thoroughly enjoyed my time working for the best franchise in the NFL," Thum said. "I appreciate every opportunity the Hunt family has afforded me and my family and I wish the Kansas City Chiefs all the success they deserve in the future."
"Denny has been an integral part of the Chiefs family and this community for nearly four decades, and we thank him for his dedication and commitment to our organization,” Hunt said in a news release. “We appreciate the many contributions he has made to the Chiefs and wish Denny and his family the best in their future endeavors.”
In May of last year, the Chiefs promoted Thum to President on the heels of the Mark Donovan's arrival, who replaced Thum as Executive VP and COO.
With Carl Peterson's exit in December of 2008, the Chiefs divided the football and business operations. GM Scott Pioli is running the football side of things while Hunt will now replace Thum on the business side of things.
If my understanding is correct, Donovan reported to Thum who reported to Hunt. With Thum now gone, it's possible Donovan has a growing role in the organization. Many people I talk to say he is one of the best in the business.
Thum has been with the organization since 1974. We wish the best of luck to him in the future.