Does Moisés Ballesteros's Profile Indicate Looming Regression, or Continued Brilliance?

[RandallPnkFloyd]

Image courtesy of © Denis Poroy-Imagn Images

Given his lack of a defensive position (and, somehow worse, the times when he does have one), you won't find Moisés Ballesteros near the top of any WAR leaderboard. He doesn't have the two-part value to drive up that number. If you were to flip the order over to wRC+, however, you'd find him pretty quickly. In fact, with a 216 wRC+ in 69 plate appearances, Ballesteros trails only Yordan Alvarez for the major-league lead.

As obscene as that figure is, the rest of the stat sheet is no more subtle. His slash goes .387/.435/.710. He's hit five home runs, barreled 13.7% of his batted balls, and hit 56.9% of all his batted balls hard. That latter figure sits in the 97th percentile for the league.

Perhaps most encouraging about the start from Ballesteros is that virtually everything he's producing is coming on the strength of exactly what we thought his skill set was. The power has outperformed what might have been expected, given his launch angle throughout his previous pro career, but he's also been aggressive, while managing consistent contact. That's long been the book on Ballesteros: he's not particularly patient, but he's able to adapt his swing to drive the ball and avoid strikeouts. Contact and swing trends each illustrate exactly that. 

Given how seamlessly the profile has manifested in nearly a full-time role, is it possible that his skill set could help him stave off what seems like inevitable regression? There are already some factors that lay down the groundwork for at least a modest step back in production. His batting average on balls in play sits at an astronomical .442. His 49.4% swing rate and 32.8% chase rate are higher than the league average. Extreme batted-ball fortune from a rookie hitter who's been aggressive at the plate seems like a recipe for a big comedown—especially when that rookie is one of the slowest players in baseball.

While those elements may work in conjunction with one another to create regression (as they have, repeatedly, throughout baseball history), it's also entirely possible that the profile and what we've seen in the swing thus far from Ballesteros will keep him ensconced among the top hitters in the league.

For one, the contact rate has remained strong. Ballesteros makes contact on nearly 80% of swings. He's also using the zone to evenly distribute his contact all over the field: 

It's much more difficult to get a read on a hitter when his tendencies are less apparent than most. Ballesteros has pulled the ball and gone up the middle 34% of the time each, with another 32% headed to the opposite field. That'll make the opposition's adjustments more difficult. If he was a dead-pull guy, for example, you could work the outer part of the zone to get some softer contact out of him. Given how adept Ballesteros has been at hitting the ball all over the field, however, that becomes much more difficult if you're an opposing arm. 

He can do that because his swing has some extraordinary characteristics. Ballesteros's average bat speed this year is 73.8 MPH, up from 72.7 last year. His contact point has moved 5 inches farther in front of his frame, and that intercept point comes with his bat working uphill in the ideal attack angle range 61.4% of the time, a near-elite rate. 

It's one thing to expect regression. The early combination of BABIP and aggression for a rookie have spelled doom for many of Ballesteros's predecessors. Those two factors could certainly be responsible for at least a mild step back on the stat sheet in the future. At the same time, there's a profile afoot here that could allow him to fend it off in a way that few hitters are equipped to do. A contact-oriented yet adaptable swing has allowed him to absolutely thrive to this point. That blend should continue to carry him, regardless of what adjustments may be on the horizon from the opposition.

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