The show is about celebrities learning golf from Tiger's coach
Michael Phelps retired from competitive swimming just days ago, but the most decorated Olympian of all time has already moved on - from the pool to the putting green for a reality TV show.
Phelps announced on Saturday that he will work on his golf handicap under the watchful eye of Tiger Woods' former coach Hank Haney in a new series of the Golf Channel's The Haney Project.
The 27-year-old had said he planned to relax after his retirement but clearly Phelps' competitive streak won't let him remain idle for long as filming on the series starts next month.
In a statement, he said: 'As I enter this next chapter of my life, I think I will be able to shift my competitiveness to anything I put my mind to and golf is one of the things I want to focus on.
'If I have a goal of dropping a certain amount of shots, or working on my short game or putting, those things are going to keep me motivated and fire me up and keep me excited.
'I want to play all the world's great golf courses, but I'd like to play them well.
'I'm excited about this project with Golf Channel and I'm looking forward to working with Hank and see what we can do together on the golf course.'
Previous celebrities to take on Haney's golfing challenge include Maroon 5 singer Adam Levine, controversial radio talk show host Rush Limbaugh, and ex-NBA player Charles Barkley.