In the restless search for the missing piece that will free the mind of Rory McIlroy and allow him to complete the career Grand Slam by winning the Masters, the best-selling golf author Keith Elliott has always been consistent.
We enjoy a regular correspondence and his emails usually end with the same plaintive refrain: 'When is Rory going to become a father that will make all the difference?'
With the happy event now imminent, Elliott's long-held theory regarding the mental boost that golfers receive when they become parents - the Nappy Factor he called it - is about to be put to a very high-profile test.
The arrival of Rory McIlroy's first child could help give the Irishman a mental boost
The evidence is persuasive enough to have exercised the mind of the ultimate geek, Bryson DeChambeau. The mad scientist disclosed recently to fellow pro Andrew Landry that he had worked out the percentage win rate for new fathers - of course he did - and it was abnormally high.
Sadly, Landry didn't disclose what the rate was in relaying the conversation, but the mechanics are sound enough. The thing that kills golfers is all the time they have between shots to think, combined with the burden of expectation.
What better way to douse both than the perspective that follows becoming a parent? Augusta witnessed a prime example just four years ago. Danny Willett arrived only 11 days after his wife had given birth, and freewheeled all the way into a green jacket.
Bryson DeChambeau's research suggests the win rate for new fathers is abnormally high
The ultimate specimen is the greatest golfer of all, Jack Nicklaus, who became a father at the age of just 22, and would have five children. In other words, he had golf in perspective his entire career, which helps to explain his longevity. 'Jack plays golf in his spare time,' his great friend Lee Trevino used to say. What a wonderful frame of mind to take into majors. No wonder Jack did all right in them.
And how about Ian Poulter and Webb Simpson? Relative to natural ability, they might be the two biggest over-achievers in the modern game. They also have nine kids between them.
Of course, it doesn't always work. The joy of