Not all PGA Tour golf courses are created equally. Aside from the contrast in terrain, types of grass and natural surroundings, the scores players shoot at particular courses highlights the divide between those where we expect to see a birdie-fest and those where par can be a man's best friend.
For example, Russell Henley, a Tour rookie, won in his very first start at the Sony Open in Hawaii with a remarkable 72-hole score of 24 under at Waialae Country Club. While beautiful, no doubt, Waialae is flat and lends itself to low scores.
A place like Congressional Country Club in Bethesda, Md., which plays host to AT&T National, meanwhile, was won by Tiger Woods a year ago and his winning total of 8 under.
Mike Dudurich of BleacherReport.com  recently took a look at the 10 most difficult courses on the 2013 PGA Tour schedule.
Dudurich opened the piece with this:
Numbers normally don't lie in golf. It's easy to figure out who's playing well and who isn't by looking at the statistics.
The same thing goes for courses. Players can name this course or that one as the most difficult they've ever played, but the numbers make it crystal clear as to which courses are the most difficult.
And they also make great indicators as to how courses will play in the future.
Those numbers played a definite role in this list of the 10 most difficult courses on the 2013 PGA Tour.
Here's what Dudurich wrote about Congressional:
There are good reasons for Congressional Country Club being ranked as the third-toughest course on the PGA Tour in 2012. Eighteen reasons, to be exact.
The Blue Course -- host of the AT&T -- is a collection of great and very difficult holes, including as good a group of par 4's as there is on the PGA Tour.
At 7,569 yards, tour pros averaged 73.046 strokes per round in 2012, 2.046 above par.
Only 12 eagles were recorded at Congressional last year, a very low number for the tour’s talented stars. The second, fourth and 11th holes were among the Top 25 toughest holes a year ago.
To read all of Dudurich's piece, click here .
Follow T.J. Auclair on Twitter, @tj_auclair .