How the Twins Will Try to Make Pablo López into an Ace (Free Preview)

Pablo López , who will turn 27 in March, has five pitches, and he’s tinkered with his arsenal several times in the past few years, as he and the Marlins have tried to accomplish the ascension from mid-rotation starter with upside to ace. The Twins will try to further refine that mix. It all starts, though, with the two pitches that require little in the way of further polish: his fastball and his changeup.

When it comes to heaters, the Twins have a type, in more ways than one. Firstly, they like four-seamers, not sinkers. Only the Dodgers threw more four-seamers than did the Twins in 2022, and only the Dodgers threw fewer sinkers. 

Fastball Usage, MLB Teams, 2022

Source: Pitch Info, via FanGraphs

López has both pitches, and the Twins aren’t dogmatic about this, so it’s possible they’ll allow him to keep using each. (Sonny Gray , who came over from a team with similar fastball tendencies in the Reds, threw his sinker more than a quarter of the time last year–though he did throw the four-seamer more, for the first time since 2019.) On balance, though, they’re much more likely to have him eliminate the sinker, because (like Gray) he has a four-seamer with the other characteristic they love: a very flat Vertical Approach Angle (VAA).

In the world of pitching nerds, VAA is all the rage. We'll take a deep dive into why, and also discuss why Lopez's best pitch - his notorious changeup - is such an unusual weapon. Plus, we'll touch on the pitch selection adjustments he is likely to make. But that kind of 1800-word deep-dive analytics-driven story can't be financially supported by ad revenue in this world, so we reserve it for our Caretakers, who support that kind of content. Eventually, we hope we'll have enough Caretakers to provide it on a regular basis for everyone, but in the meantime, you can see it by becoming a Caretaker. 

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