By Dave Tindall Twitter: @DaveTindallgolf. Last Updated: August 6, 2013 10:33am
Keegan Bradley: Fitted the pattern in 2011 despite it being his first major
When Keegan Bradley took victory in the 2011 US PGA, there was a desperate search for clues.
How on earth could someone playing in his first major even think about winning the title - after all it had only been done twice in the game's history.
What did Bradley have on his CV that suggested he would become a major champion?
As it happened it was really rather obvious.
And, crucially, if you're trying to pick the winner of the US PGA Championship at Oak Hill it's the same thing that has united so many winners of the year's final major.
The 'secret' couldn't be more straightforward and it doesn't take a genius to figure out its power.
Quite simply, Bradley went to Atlanta Athletic Club with the benefit of a recent win under his belt - a play-off victory in the HP Byron Nelson Championship just three months earlier.
The belief it gave him was clear and Bradley's story is no one-off.
The effect of being boosted by a recent win certainly applies to many major winners but it's particularly strong at the US PGA.
Here's the list dating back to the start of the millennium: Had they won previously that year?
2012 Rory McIlroy YES
2011 Keegan Bradley YES
2010 Martin Kaymer YES
2009 YE Yang YES
2008 Padraig Harrington YES
2007 Tiger Woods YES
2006 Tiger Woods YES
2005 Phil Mickelson YES
2004 Vijay Singh YES
2003 Shaun Micheel NO
2002 Rich Beem YES
2001 David Toms YES
2000 Tiger Woods YES
1999 Tiger Woods YES
So 13 of the last 14 US PGA winners had won that same season - the one exception, ironically, being Shaun Micheel at this year's venue, Oak Hill, in 2003.
The correlation is extremely strong although it's worth remembering that, as it's the final major of the year, the pot of players who have had chance to post a victory is obviously much bigger than it would be for April's Masters.
Still, backing a 2013 winner makes plenty of sense and should be the foundation of your staking plan or fantasy picks.
Those holding US PGA entries who have won on either the US or European Tour this season reads:
Charl Schwartzel, Jamie Donaldson, Chris Wood, Stephen Gallacher, Richard Sterne, Kiradech Aphibarnrat, Marcel Siem, Brett Rumford, Graeme McDowell, Peter Uihlein, Matteo Manassero, Mikko Ilonen, Joost Luiten, Ernie Els, Paul Casey, Phil Mickelson, Dustin Johnson, Russell Henley, Brian Gay, Tiger Woods, Brandt Snedeker, John Merrick, Matt Kuchar, Michael Thompson, Scott Brown, Kevin Streelman, D.A. Points, Martin Laird, Adam Scott, Billy Horschel, Derek Ernst, Sang-Moon Bae, Boo Weekley, Harris English, Justin Rose, Ken Duke, Bill Haas, Jonas Blixt, Jordan Spieth, Woody Austin, Gary Woodland.