People keep predicting regression for Rosario and while I think he'll slide a bit, he could also progress. Remember that he had a terrible month to start 2017 (.660 OPS). All of Rosario's metrics trended in the right direction and he's only entering his age 26 season. The power could be legit (and almost surely is to some extent). When the season began, I suggested that all Rosario needed to do was stop swinging at the worst 3-4% of pitches thrown to him (and drew a few laughs that such a minor change would reap dividends). His wrists and contact ability could turn that small adjustment into him being a decent player (though I didn't expect the outbreak of power to the extent we saw this season). As it turns out, that's exactly what Eddie did this season. His O-Zone Swing % dropped 4.1% (overall swing rate dropped 2.0%). As a result, his O-Zone Contact % jumped 6.5%, likely due to the fact he was laying off the pitches he couldn't hit and still swinging at the pitches he could. His overall contact rate jumped a whopping 5.3%. As I thought might be the case, that small change caused a domino effect. Rosario's hitting profile used to be untenable. Now, given his wrists and bat speed, it might be sustainable. Rosario didn't need to change his approach drastically to have success in MLB, he simply needed to lay off the junk pitches because they killed so many of his plate appearances. If you throw something close to the zone, Eddie can probably lay wood on it. In the past, that meant pitchers threw him absolute trash to get a swinging strike. Again, the domino effect. Eddie's K rate dropped a massive 7.7%. It appears Eddie stopped swinging at the worst pitches. As a result, his contact rate shot up, his K rate dropped, he drew a few more walks, and he started forcing pitchers to give him something to hit instead of getting himself out. And that resulted in not only more contact but also better contact (hard hit up 1.6%, soft hit down 1.8%, line drive % up 0.9%, ground ball % down 3.9%).