So, let's talk about Clayton Kershaw.

The reigning National League MVP and Cy Young Award winner, the man who put together one of the most dominant regular seasons in NL history, can't get his stuff right. After a 4-0 loss to his arch nemesis Madison Bumgarner and the San Francisco Giants, Kershaw is now just 2-3 on the season with a pedestrian 4.32 ERA.

He didn't pitch badly against San Francisco, lasting 7 1/3 innings and giving up four runs on seven hits with two walks and seven strikeouts. But he didn't pitch great, and his team scored no runs off Bumgarner, who added a little insult to injury at the plate as well.

MadBum fired the first shot in a pitcher's duel with Clayton Kershaw and it was a home run: http://t.co/6uhdc2Qz00 pic.twitter.com/ZFaAJE9ilJ

— Cut4 (@Cut4) May 21, 2015

Yo, that thing went a long way.

Per MLB's gameday data, Bumgarner got a 91 mph fastball from Kershaw and hit it 105 mph. Ball traveled 415 feet.

— Alex Pavlovic (@AlexPavlovic) May 21, 2015

And according to ESPN Stats & Info, until that tater by MadBum, Kershaw had faced an opposing pitcher 410 times without giving up a longball, third-most among active pitchers (trailing according to Baseball Savant.

The Bad Stuff

But there are some issues Kershaw has had this year which, when taken together, sheds light on why the results haven't been there for him yet.

First, he's allowing more line drives this year, 25.2% of all balls put in play, than at any time during his career. Last year only 19.0% of batted balls against him were line drives. This discrepancy has helped account for his unusually high BABIP. And while he's giving up fewer fly balls than at any point in his career, just 21.3%, way more of those fly balls have been leaving the yard, 18.5% coming into Thursday.

Last year, in 198 1/3 innings, he gave up nine home runs. This year, in 58 1/3 innings, he's given up six. He's also not doing as good a job stranding baserunners, with a left-on-base percentage (LOB%) of 65.6%, far below his career average of 77.7%.

Also, 32.8% of all balls hit off him have been categorized by Fangraphs as "hard hit," way above his career average of 24.7% and last year's 24.3%. Simply put, more batters are getting the barrel of the bat on Kershaw's pitches. But why?

Location. As you can see by this graphic from Brooks Baseball, more of Kershaw's pitches, particularly his fastball, have been up and out over the plate than they were in 2014.

That has resulted in this disparity in his fastball and slider, with stats again courtesy of Brooks Baseball.

As you can see from the table above, batters are hitting almost .300 against his four-seamer, after hitting just .254 against it last year. And against his slider, teams are hitting .265, after batting just .149 against it last season. This heat map, courtesy of Baseball Savant, shows the location of Kershaw's pitches on all balls that have been put in play against him this year.

That's a lot of red in the middle of the plate.

The Conclusion

It appears as though much of Kershaw's problems stem from poor location, something that a pitcher as talented as he is, with stuff as good as his, should be able to overcome. It's more likely than not that, at some point this season and probably very soon, Kershaw will get his location issues figured out and go on some crazy run that will get that ERA down to around where his xFIP says it should be.

But until he does, he's going to get hit. Even the best pitchers with the best stuff will get knocked around if they leave that stuff over the middle of the plate.

Count on the rebound. I mean, it's Clayton Kershaw after all.