Trevor Bauer Looks Like a Completely Different Pitcher
We’ve long known Trevor Bauer as the 21-year-old kid with attitude who shook off Miguel Montero as a rookie. The No. 3 overall pick from 2011 who Terry Francona called stubborn and implored to work more with the coaching staff.
Brian Dozier recently described Bauer to Eno Sarris as someone who “lives up in the zone” and who won’t go away from his strengths to attack Dozier, a high-ball hitter. And while it’s technically still true that Bauer often throws his fastballs high in the zone, it’s an interesting reminder of the perception of what Bauer was in the past, and the reality of what Bauer is now. The perception of Bauer was that he was so transfixed with his own pitching style, he was resistant to change. The reality is now, he couldn’t look more different.
Bauer opened the year in the bullpen after a rough 2015, but found himself back in the rotation after Cody Anderson’s early season struggles. In 11 starts, he’s got a 2.96 ERA and a 3.22 FIP. Over the last 30 days, he leads the entire majors in WAR among pitchers. But results are results, and without a change in process, there’d be no reason to believe the results should be any different. This is what a complete change in process looks like:
| Stat | Change | Rank |
| ERA | -1.35 | 6th |
| FIP | -1.05 | 2nd |
| xFIP | -0.43 | 3rd |
| – | – | – |
| BB% | -2.8% | 3rd |
| GB% | +9.7% | 1st |
| HR/9 | -0.54 | 3rd |
| Zone% | +5.4% | 2nd |
| Pace | -1.4 | 3rd |
Granted, having the third-largest decrease in walk rate becomes less impressive when you’re coming off the worst walk rate in the majors. But the walks are down, and that can’t be a bad thing. The grounders are up 10 percentage points, more than any qualified pitcher from last year to the next. With all the extra grounders, the home runs have been cut in half. More balls are going over the plate, and Bauer’s working quicker than ever before. No more relentlessly shaking off the catcher. Bauer’s actually working at one of the quicker paces in the majors.
Bauer’s seemingly found something with backup catcher Chris Gimenez, who’s caught each of Bauer’s last 10 starts. With Gimenez calling his starts, something’s changed in the pitch mix, and it might be the biggest explanation for every change in the table above. Trevor Bauer, once known for his insistence on throwing his four-seamer up in the zone, is now a sinkerballer:

The four-seam is still there, but it’s the two-seam “laminar express” that’s taken over as the primary pitch. Bauer began developing the pitch under the guidance of Kyle Boddy at Driveline Baseball last offseason, and this year has begun leaning on it more than any other offering, a point of focus between the two during the most recent offseason. Interestingly, Bauer still throws the two-seam high in the zone more than he does low, but the movement of the pitch is still more conducive to ground balls, which is the most extreme and noticeable difference in Bauer’s game.
Last year, the four-seamer made up more than half of Bauer’s pitches to start at-bats and get back into counts. With Gimenez behind the plate, Bauer’s throwing all five offerings to start at-bats, suggesting an increased confidence across his entire arsenal, and the sinker and cutter have taken over as the primary pitches to get himself back into at-bats when he falls behind in the count. Indians pitching coach Mickey Callaway says he’s “simplified his mix.” Francona described Bauer’s new approach as “more conventional.” None of his five pitches are being thrown more than one-third of the time, and none less than 10%. It’s a true five-pitch mix, and any of Bauer’s predictable tendencies from last year appear to be gone.
Previous versions of Bauer wasted too many offerings, letting at-bats slip away by throwing “unnecessary pitches.” Last year, when Bauer got behind in the count and went so often to his four-seam, he put the ball over the plate less than half the time, according to Baseball Savant. This year, the sinker and cutter have been getting Bauer back into counts, as he’s putting the ball over the plate 55% of the time when he falls behind, an even more substantial increase than his overall season uptick in Zone%. Put simply, with a new approach and more strikes, this year’s version of Bauer is just a bit more to the point:
GIF courtesy Kyle Boddy
There’s that two-seamer to lead. The elevated four-seamer’s still there to play off the curve. And, about that curve. It’s getting more spin and more drop than ever before:

Only Mike Fiers and Chris Tillman are getting more drop on their curve than Bauer. Always his best secondary offering, it’s now improved. When Sarris spoke with Bauer last year, Bauer offered this now seemingly prescient quote:
“Is getting the run on the two-seamer and the drop on the curveball more beneficial than having all my fastballs and curveballs look the same coming out? How do you weight those, what’s more important? Who knows?”
Evidently, the former.
Over his last 11 starts, Trevor Bauer’s resembled a third-overall draft pick. Over the last month, he’s been baseball’s best. And he’s done it by finally overhauling the approach that once earned him a reputation as being stubborn. Before one gets too excited about Bauer’s potential, one must remember that he’s ran an ERA and FIP like this over 11 starts before, and same with the walks, and same with the homers. But never all at the same time, and certainly never in the way he’s doing it now.
August used to cover the Indians for MLB and ohio.com, but now he's here and thinks writing these in the third person is weird. So you can reach me on Twitter @AugustFG_ or e-mail at august.fagerstrom@fangraphs.com.
Learnage. 🙂
Even stubborn people are educatable.
I wouldn’t lump Bauer in with your average, stubborn kid. He’s EXTREMELY educated about pitching, spin rates, mechanics, etc.
I’d speculate pitching coaches simply kept telling him the same thing. Pound the knees kid – don’t work up the in the zone…without really understanding why he should do that. I highly doubt the pitching coach was the one who explained to Bauer that adding tail and drop on his curve is more important than having his fastball and curve come out of the exact same arm slot / location. I suspect Bauer came up with that himself.
Excellent article.
Shouldn’t he have spent that intelligence on thinking about why getting ground balls might be a good thing?
This is good stuff!
I might be arguing semantics here, but outside of the change in pace listed in the table you are actually showcasing a change in “results”, not “process”. One would assume that such a massive set of improvements would be due to an overhaul in process, but that isn’t necessarily true (mastery of process is always possible as well).
Any chance you could add a bit more to this article and show more process changes? We have the change in pace and the change in use of pitches, but is there any more information (a further look at frequencies, pitch locations, etc) that be included?
“throwing 2-seam more than 4-seam” is a pretty big change in process, no? While I agree it’s more alluded to and not entirely clear from the article/links about how he “simplified his mix”, the other part of it is he’s stopped throwing his slider, split finger and messing around with a screwball. Bauer’s slider and split always looked pretty below average to me, so that’s a matter of eliminating some lesser offerings and focusing on what works. In addition to getting rid of the slider, he’s throwing the cutter more and throwing it considerably harder. His cutter before always looked below average too because it was so slow, but it’s been 3mph harder this year than last.
I think the switch to the 2-seam is the biggest thing, though getting rid of the poorly performing pitches I’m sure helps a lot with consistency. While he still tends to work up in the zone with his fastballs, he’s doing a better job working down in the zone as well to change hitters’ eye level. I would say in the 1st half of last year it was somewhat similar, where he was having success, but then he reverted to more 4-seam up in the zone. Eno had an article last August about how he’d lost some run on the 2-seam last year as the season went on, which might have been a driver of his 2nd-half struggles. Seems like Bauer may just have finally mastered and is comfortable with the 2-seam.
Shhh, I want the Jays to trade for Bauer. He and Martin can continue the improvements and Sanchez can move to the pen to save innings.
Why would they move their best starter to the bullpen?
inning restrictions.
Because they’re run by a magic 8-ball
The magic 8-Ball is running the Nats
So trading Bauer and Joe Ross would be too much for Harvey??
I like this article – double thumbs up. I think Bauer is making his transformation. Lets not forget he really is in his third year of work. Tough to draw a parallel, but Greinke had a wide array of pitches and he struggled his first couple years (albeit with other issues).
Great piece. Even Steamer and ZiPS, justifiably conservative as they are, have bought into real improvement based on his recent stretch.
One very minor style gripe for FGs writers: point changes to BB%, K% and other rates aren’t themselves percentage changes, so shouldn’t be expressed as such. A 2.8% drop in walk rate would be totally unremarkable. A 2.8 pt change is much more impressive.
He talked about all these things last year. It is even in the related links above:
http://www.fangraphs.com/blogs/trevor-bauer-towards-better-pitching-through-science/
He talked about how frustrating it was with his pronation to spin the off-speed stuff the way he wanted to, and that he said over time he wanted to spin for command, or get the ball in the dirt. He also talked about minimizing his arsenal vs. deception and what was more important to have to be a dominant pitcher.
He’s had a lot of bullpen sessions to improve upon what he stated in the interview. He has a hi-def camera in his home to correlate spin rates on his pitches, Find it funny that we are all here surprised at his resurgence, when we knew he was going to refine his approach by gutting out his problem pitches and commanding the spin of his sinker/four-seam.
For godsakes he literally gave an amazing interview about the very changes we are lauding. It was clear this dominance was coming.
Yep. I drafted him in 5 of my 6 fantasy leagues for exactly this reason. Would have had him in 6/6 if he hadn’t gotten sniped by a fellow owner I talked about him over the off season.
Pitchers are talking about changes they are making all the time and they frequently don’t lead to dominance, so it was certainly worth an article to show how he is making these changes in games, and how it is impacting his results.
From the article: “Take spin rate. The pitcher installed a TrackMan unit in his house. That’s serious work, and expense, done in order to “figure out how to train in order to spin the ball better.”
How many pitchers do you know have this in their house? And I’m not downing the article, I am surprised the article didn’t expand upon Bauer’s interview, which I thought was one of the best insights into pitching Fangraphs has done.
I get that long-timers/members are going to get more upvotes but don’t be a revisionist. I know pitchers talk about changes all the time but that particular interview and Bauer’s intelligence is very unique and seldom do you find his stuff, intelligence, knowledge of history, and studious attitude in mediocre arms.
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