To try to figure out a little bit of his HR uptick, I have been checking out some pitch f/x and other info. By his game logs, it looks like he gave up most of his HR in May/June: April-4 May-6 June-9 July-2 August-3 September-3 His Pitch Fx showed that for April and May, he was throwing his 4 seam around 43% of the time, and his sinker around 35%. Then he started transitioning his pitch selection over the next couple months, and for the last 2 months, he was throwing his 4 seam only about 35% of the time and his sinker over 50% of the time. When we then check his ISO on those pitches, for April-June, his 4 seam ISO was over .240, but after that it dropped to about .120 for July-September. His sinker had an ISO of not much more than .100 on the season as a whole, but it did spike to .212 in June when he was giving up homers right and left, and to .164 in September, when he was potentially wearing down in his first year back. Of course, the interesting counter to the theory that he was wearing down was that his velocity was highest in September. His Pitch F/X velocity readings are only very slightly lower than this 2015 readings, and my understanding of the "higher velocity" readings in MLB was due to MLB switching from Pitch F/X to Statcast, so his Pitch FX readouts shouldn't be impacted by that change, *so I don't know that I buy into him losing a ton of velocity as being the reason for his HR troubles. If we look at his flyball rates by pitch in 2017, it was extremely inflated in May and June against his 4 seam, at 52% and 60%, in months where he was still pitching his 4 seam fastball over 40% of the time. Prior to 2016, he had a tendency to use his 4 seam 50% of the time or more, and his sinker about 30%. For 2017 it seems that he started relying on the sinker more, so it will be interesting to see what he does going forward.