ESPN president John Skipper resigned Monday morning, and the sports giant cited substance abuse problems as the driving reason behind Skipper’s departure.

Skipper stated the following in an ESPN release:

Today I have resigned from my duties as President of ESPN.

I have had a wonderful career at The Walt Disney Company and am grateful for the many opportunities and friendships. I owe a debt to many, but most profoundly Michael Lynton, George Bodenheimer and Bob Iger.

I have struggled for many years with a substance addiction. I have decided that the most important thing I can do right now is to take care of my problem.

I have disclosed that decision to the company, and we mutually agreed that it was appropriate that I resign. I will always appreciate the human understanding and warmth that Bob displayed here and always.