Paul Goldschmidt Has A Pop Up Problem

Growing up my dad would sometimes refer to my sister and me as ingrates. I always had a sneaking suspicion that statement was ruthless. I was young and under the assumption that he provided us everything we needed and wanted because that was what he was designed to do. In a sense, that perception of him probably does reflect the ungratefulness that children posses, innocent as it may be. I am now a parent of a two year old boy and just the other night he saw a commercial for a Power Wheels Jeep Wrangler that elicited the following outburst:

“I want to go in there!”

“I want one!”

He then proceeded to turn, peer into my eyes, and, in order to accentuate the severity of his next mandate, raised his index finger and spoke;

“Daddy, better buy me one.”

His tone was more subdued than the first two exclamations, and it made me laugh the hardest. I am certain I was the narrator of many statements similar to this as a kid, but the reality is, when kids are given everything they want, it’s up to the parent to understand that the “ungratefulness” is a direct byproduct of trying to make them happy or keep them alive. If it feels like there’s an undercurrent of unresolved issues from my childhood, don’t worry, I do plenty of cognitive behavioral therapy.

Lately I’ve been thinking of how I can be really ungrateful for even truly fine baseball seasons. Even some all-star seasons disappoint me, and I know I’m not alone. If Mike Trout was in the middle of putting up a 5 win season, we’d all be talking about what could be wrong with Mike Trout. When players set the bar so ridiculously high we tend to hold them to that standard. As an actual example, it’s completely understandable to be disappointed by Bryce Harper’s season after last year’s masterpiece. The reality is, however that he’s 23 and has currently produced 3.4 WAR. His baserunning and defense have been positives and he’s compiled over 20 home runs and 20 stolen bases while hitting 14 percent better than league average; that’s damn fine and yet it’s still a damn shame.

But Paul Goldschmidt is hitting .301/.414/.494 and has accrued 4.7 WAR and might surpass 30 SB this year. His 136 wRC+ is still great even if it’s not quite the 158 he’s put up over the last three seasons. So why am I disappointed? Firstly, and admittedly shallow of me, I like my Goldschmidt with more extra base hits. For the first time in his professional career, at any level, Goldschmidt’s ISO starts with a number under 2. It’s possible he has a nice final week and brings that number up into the .200 range, but there are still some potentially concerning blips in his batted ball profile that could portend of suppressed production. What I’m referring to most specifically, as the title suggests, is that Paul Goldschmidt has developed a pop up problem.

From 2011 through 2015, Goldschmidt’s cumulative IFFB% was 4.8%. This year it sits at 14%. He has 17 IFFB this year, which is the same amount he had in the three previous seasons combined. Pop ups aren’t good. Here are the 10 players with the biggest increases in IFFB% in 2016 compared to 2015 among qualified hitters in both years.


I’m not suggesting there’s a positive correlation between popping up and performance, but it’s easy to make sense of some of the names that appear on this list. If you watched Josh Donaldson breakdown his swing on the MLB network, you know that a lot of players are thinking about not hitting the ball on the ground because damage is done in the air. Did you know that DJ LeMahieu, at the time of this writing has a higher slugging percentage than Goldschmidt? That’s bonkers. The league’s slugging percentage last year was .405, this year it’s .418, but this group of players, minus Goldschmidt, have added, on average, 21 points to their slugging percentage and part of that, for this group, has to be contributed to putting more balls in the air.


What I’m hoping to highlight is that what is even more troublesome for Goldschmidt is that he is the only player in this top 10 who had an increase in their IFFB% while also seeing his fly ball rate and hard hit rate drop.


So I have what could be an insultingly obvious hypothesis, but since Goldschmidt has long been a quality opposite field hitter, I am theorizing that pitchers are exploiting him with more fastballs up and in where he can’t quite get his hands extended. A cursory glance at his heat map vs fastballs in 2015 and 2016 reveals a minor shift in approach by the league.

Besides the obvious, which is that pitchers are avoiding the zone even more than they had before, we can see just a bit more red in the specific zone I was referring to. It’s not completely obvious, so let’s see if that’s where pitchers are getting Goldy to pop up. On the year, per Brooks Baseball, he has 22 pop ups, 19 from fastballs and 3 from offspeed pitches. The 17 that are classified as IFFB by fangraphs are plotted in the graph below.homemade-heatmap

But it’s not as if pitchers have previously avoided throwing Goldschmidt up and in, it just appears, despite his overall swing rate being at a career low 39%, he’s upped his swing rate against fastballs by over 5 percentage points in that specific area just above 3.5 ft that has led to the majority of his pop ups.  Looking at the entire area middle/up/and in to Goldschmidt, he has increased his swing rate from 57.2% in 2015 to 60.7% in 2016 while staying away from lower pitches in general.  It’s a philosophy that is being echoed throughout baseball right now, and it is not at all a bad plan, but it has caused him, either deliberately or by the effect of swinging at these pitches more often, to go to the opposite field this season less than he ever has. This also is not necessarily a negative shift to a batted ball profile, but from 2013 – 2015 he was the 5th most productive hitter in baseball going the other way, and in 2016 he’s 33rd. That represents a drop in wRC+ from 204 to 158, and from a .729 SLG (.329 ISO) to a .647 SLG (.255 ISO).

At the end of this season I don’t think I’ll actually be all that worried about Goldschmidt; I can reconcile a 136 wRC+, even if it would feel a little disappointing.  So I think if I’m going to take a 136 wRC+ for granted I should place that appreciation towards the catalyst for this change in Goldschmidt’s performance, and a lot of that credit has to go to the pitchers who have induced 17 IFFB from a player who only averaged 5.7 over the last 3 seasons.

Now I know that setting up a pitch has so much more to do with the pitch that was thrown immediately before it, but for this exercise I want to look at the pitch that caused Goldschmidt to pop up and how it relates to the pitch thrown immediately before it. It’s crude and does not tell the whole story, but it still shows a definite approach – and, for all intents and purposes, it’s probably a decent representation of the general tactic used across the league for inducing pop ups.  I found all the data I needed using Pitch fx at Brooks Baseball.  I recorded the Velocity, horizontal movement, vertical movement, horizontal location, and vertical location of each pitch Goldschmidt popped out on as well as the same data set for each set up pitch if there was one (which would be in any situation where Goldschmidt did not pop up on the first pitch of an bat). Below you’ll find a plot that shows the average location and characteristics of each pitch.


And here is that data in a table represented as the average difference between the two plot points.


Doesn’t it make you feel warm when something fits into the shape you had pegged it to be.  That’s just really simple and makes a hell of a lot of sense.  I really appreciate that.  Now if you’ll excuse me, I have a Power Wheels Jeep Wrangler to buy.




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