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Breaking Down the Causes of Moose's Struggles

Still Pop Up Royalty

Brian Garfinkel

Mike Moustakas has struggled to generated any kind of hits this season. The balls which fall for hits rarely allow him to go for extra bases. The problem has gotten so bad, Moose is now going to correct his swing. I am going to take a stab at what Moose is doing to cause such disaster full results.

Note: Article and data was accumulated after the game on 4/24/13 and has not been updated from the game which just finished.

Mike has had 66 plate appearances with total of 9 hits and 2 doubles are his only extra base hits. For the season, he is putting up a TPJ-ish triple slash line of .148/.212/.180. Out of the 192 qualified hitters, he has the 3rd lowest OPS in the league at .392 (the AL Central has 5 of the bottom 6 with each team representing).

Looking a little deeper shows Mike's real problem. He has a BABIP of only .176. The low value is being fuel by a 62.7% fly ball percentage, the league leader. Since none of his fly balls have gone for home runs, all his fly balls have probably been outs. Additionally, he has more infield fly balls (7) than line drives (6). Mike stats suggest he is trying to sky the ball out park with too much uplift and not enough power.

One encouraging stat of his is an improved plate discipline. His BB% is up over 1% points to career high 7.6%. Also, his 15.2% K% is below his career low of 17.7%. The improvement is from swinging at less pitches out of the strike zone. He swung at 35.2% and 37.6% of the pitches out of the strike zone in 2011 and 2012. The number has dropped to 31.5% in 2013. Moose is displaying more plate discipline, but it has not translated hitting pitches better.

Yost states the problem is Moustakas is starting his swing too early.

The problem, according to Yost, is that the left-handed-hitting Moustakas' front foot is "drifting" on his swing, coming forward too soon.
"When you get out in front, you've got nothing left to drive your hands through with," Yost said.

Here are few swings from Moustakas. I am only looking at straight fastballs right down the middle of the plate. I found four such swings with different results each time, infield fly ball, outfield fly ball, a single and a double.

4/5/13 - Single (7th inning)


4/5/13 - Double (8th inning)


4/10/13 - Infield pop up (6th inning)


4/20/13 - Flyball out (9th inning)


As I noted this past winter, Mike Moustakas' swing makes him inclined to pop ups. He drops his back elbow early in his swing. A low back elbows normally leads to an extreme upper cut swing. Besides the low back elbow, he is a naturally right handed hitter. His dominant arm will be pulling/leading his swing. Normally, the natural right handers hitting left handed love hitting the low inside pitch, which which can be hit easily with the shoulder down.

To see this for yourself, get in a batting stance and point your elbow down somewhat. Now take some imaginary swings at some pitches at different parts of the plate. Pitches high and outside and low and inside are the most natural to hit. The low outside pitch is tough to reach and the high inside pitch is hit with an extreme up swing. Now try to think of doing it from the opposite side of the plate.

The following run value heat map shows where Moose's results are above and below the league average. All events are added in and it is from the catcher's perspective.


He is good against the high and outside pitch and the low inside pitch.

Pitchers are now noticing he has problems with the high inside pitch and are pounding that part of the plate. Last September, 7.1% of the pitches he saw where inside and high. This season, the number has almost doubled to 13.9%. To further show how pitchers have changed their approach, here is the average pitch location for each pitch he has season over the past 3 seasons.


While, not a ton of change, pitchers are going inside quite a bit more with him.

Mike Moustakas's problems come down to a few points. His swing leads to flyballs, specifically infield flyballs. Flyballs are easy outs. A high number of outs leads to horrendous production. Horrendous production is a nice way to describe Moose's season to this point. Until Moose is able to hit with out skying the ball, he is going to continue to struggle.