Kenta Maeda’s Slider and the Chase for Valenzuela’s Record
We’re left to wonder how players who have established careers in international leagues will fare when they first reach the major leagues: some never find the same level of production they had overseas, others endure a tough adjustment period, and a precious few immediately take to their new surroundings. From what we’ve seen of Kenta Maeda so far, he appears as if he could be a member of that final group: with only one earned run conceded in 19.0 innings over his first three starts of 2016, Maeda has been every bit of the solid #2/#3 starter the Dodgers envisioned slotting behind Clayton Kershaw. Maeda is also quietly echoing the success of another rookie Dodger starter who came before him, one whose consecutive string of successes to start the season led to the receipt both of the Rookie of the Year and Cy Young awards in the same season — and caused a sea change in Dodgers’ fandom while doing it.
There are a few interesting trends that have been driving Maeda’s success in this young season. While he’s posting a slightly depressed BABIP (.250) compared to league average, his batted-ball profile so far suggests that might not be a fluke: his line-drive rate is in the top 25 of starters with at least 10 innings pitched, and he’s posted above-average ground-ball and infield-fly rates. The 100% strand rate won’t stick, and the 5.9% HR/FB rate likely won’t either, but there’s at least some encouraging signal in this noise. We already had an idea that Maeda’s walk rate was going to be better than average, and he hasn’t disappointed in that respect, issuing free passes to just 5.5% of batters faced.
It’s Maeda’s unique approach that warrants the most attention, however. Last December, our own Eno Sarris tried to find a comp for Maeda, and he included this snippet in his breakdown:
Maeda’s best secondary is a slider, and his next-best is probably also his slider (he varies the velocity and shape). Against righties this year [2015], Maeda was almost 95% fastball/slider according to some observers.
In 2016, Maeda has lived up to that billing. He’s thrown his slider almost 30% of the time overall, and against righties, the mark is 41.2%. He can alternate between a 79 mph offering with increased vertical movement, like this:


