"I am incredibly grateful of the opportunity that I had to coach Tiger Woods," Haney wrote in an email to USA TODAY. "It was just time for both of us to go in another direction."
The news of Haney's resignation was first reported by the Golf Channel.
On Haney's website, he wrote: "I have informed Tiger Woods this evening that I no longer will be his coach. I would like to thank Tiger for the opportunity that I have had to work with him over the last six-plus years.
"Tiger Woods has done the work to achieve a level of greatness that I believe the game of golf has never seen before. And I will always appreciate the opportunity that I have had to contribute to his success. However, I believe at this time that it is in both of our best interests for me to step aside as Tiger's coach.
"Just so there is no confusion, I would like to make it clear that this was my decision. Tiger Woods and I will always be fiends, but I believe that there is a time and place for everything and I feel at this time and at this place in my life I want to move forward in other areas."
-USA Today