https://www.mlb.com/news/cubs-jason-heyward-working-on-swing-for-2018/c-266199328
I see i guy who hit .271 and .293 hitting .230 and .260 after that , that struggling to me..
Sure he improved off his .230 but he still struggling from what he did those 2 previous years..
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I mean that link doesn't specifically say anything about what they are "changing." I think it's just a lazy writers way of saying he's doing work this offseason. I could dig up the quote but I think it's safe to assume people know I'm not making shit up. I remember specifically reading Chili say that he was less concerned about what Heyward was doing with his swing and more concerned with his mentality. I'm paraphrasing here of course but the gist I got was that rather than having him change his swing a la Mallee that Chili would prefer to take an approach similar to how the cubs treated Arrieta. That is to say they want him to go back to how Heyward feels comfortable rather than what's "optimal." And I know specifically chili has talked about him being more interested in addressing the mental aspect of the game with Heyward.
So, maybe it's semantics here but I don't think it's accurate to say Heyward will have a new swing again. And parade who seems to be way more knowledgable about this stuff than me would suggest Heyward didn't really even change his swing last year. I'm not going to put words in his mouth as to what changed but I know I've seen him mention that he really didn't change that much. Regardless I think their goal is to just get him back to the player he was with Atlanta rather than changing him again.
As for struggling, I think it's fair to say last year was a down year but my point is had 2016 not happened people really wouldn't be killing Heyward for the year he had last year. It would be more a case of well surely that'll rebound. I get where you are coming from but I think it's far too easy for people to put too much weight on what happened in 2016. I don't want to cherry pick data here but if you exclude that and look at just 2017 on it's own, the numbers look far better than you would expect giving the general negative opinion people have. Just to illustrate this point I'll go back to that 2014 year in Atlanta
2014 Atlanta
10.3%/15.1% bb/k rate, .113 ISO, .308 BABIP, .271/.351/.384, 24.3%/49.4%/26.4% soft/med/hard contact, 40.2%/33.7%/26.2% pull/center/oppo, 18.9% line drive rate, 45.5% GB rate, 6.5% HR/FB, 7.7 % swinging strike rate, 82.2% contact rate, 43.2 % swing rate, 63.9 % in zone swing rate, 27.3 % outside zone swing rate
2017 cubs
8.5 %/13.9 %, .130 ISO, .284 BABIP, .259/.326/.389, 25.7 %/48.8%/25.5% soft/med/hard contact, 46.3 %/33.9 %/19.8 % pull/center/oppo, 19.9 % line drive rate 47.4 % GB rate, 9.2 % HR/FB, 7.1 % swinging strike rate 84.7% contact rate, 46.4 % swing rate, 69.7 % inside zone swing rate, 28.6 % outside zone swing rate
That's a lot of stats but here's the take away. He walked less which is bad but he also K'd less which is good. All things being equal though I'd rather have the walks with the K's. The triple slash is basically the same when you factor in the walk rate. BA is a bit lower but that's surely the BABIP at play. His ISO last year is up a fair amount which is good given that was sorta always the hope to find more power with him. The soft/med/hard contact rates are basically identical. There's a little variance but it's not likely statistically important. One other thing that caught my eye a bit was the 6% more pull side batted balls. I'm guessing that's part of why there's more power shown but one of the concerns from 2016 was his swing was pulling balls he should drive to LF into fowl territory. Unsure how much of an issue that still is but figured it's worth noting. Rest of the batted ball data is basically the same save for the HR/FB rate being up but that obviously goes with the idea of more power in 2017. And the swing rate stuff basically comes down to him making more contact in 2017 but swinging more.
Point here being statistically those 2 seasons are pretty fucking similar. I think you could argue 2017 Heyward had a bit more slugger and less of a "hitter" in his game but that kinda was the cubs in a nutshell last year. I don't wanna totally blame that on Mallee but that seems a bit of him pushing for more power with guys. And as previously mentioned I think it wouldn't kill Heyward to be a bit more patient like in 2014. But all that not withstanding, we're not talking a huge gap in production those 2 years.