Szymborski’s Breakout Candidates for 2020
Predicting breakout candidates is one of the hardest and most frustrating tasks for anyone who tries their hand at baseball soothsaying. By its very nature, a breakout (or breakdown) projection is a low probability event. If it wasn’t, it would be the basic projection! Your big hits will be next to some embarrassing mistakes. For example, if I were of a mind to gloat about having said in this 2018 piece for ESPN that Christian Yelich had a peak Joey Votto/Will Clark season in him, I couldn’t get around the fact that the player listed right after Yelich was Danny Salazar, who has appeared in one game since that article ran.
So what constitutes a breakout season? Is it a player making a significant change in one aspect of their game? A bounce-back season? Is a top prospect showing improvement a breakout? Or is it a sudden step forward along broad lines? I’d argue that it’s any and all of these things. I used to try to statistically define a breakout season, but in the end, I found no purely mathematical estimation that was satisfactory. As I’ve written this piece over the years, I’ve gone with a more abstract definition: when a player, capable of contributing to a playoff contender, is able to fundamentally change what we think of them.
Predicting breakouts and breakdowns for 2020 is even tougher than usual thanks to the 60-game season, which will complicate knowing if I’m right even if it is somehow miraculously played to completion. But it’s part of the job, so let’s get to the bet-making instead of the bet-hedging. Here are my 10 favorite breakout picks for 2020.
Eloy Jiménez, Chicago White Sox
Eloy Jiménez had a vaguely disappointing rookie year in 2020, with a .513 slugging percentage in a pinball season not enough to balance out the .315 on-base percentage and mediocre defense. What keeps me a believer is that he was a more well-rounded hitter in the minors than he’s displayed in the majors and it’s way too soon to peg him as a low-OBP slugger. It was encouraging that his plate discipline numbers improved over the course of 2019, and ZiPS thinks his second-half .337 BABIP is closer to his real number than his .275 over the season’s early months.
I don’t think a year similar to Yordan Alvarez’s .313/.412/.655 2019 would be all that shocking. Neither does ZiPS; in a 600 PA season, it put his 90th percentile home run total at 54.
I kind of wanted to put Nomar Mazara here as a tandem, but I resolved to stop picking him after doing so for three consecutive seasons and whiffing each time. A breakout is still a possibility for Mazara, but if I pick him for a decade and he finally does break out, I’d just be the blind squirrel finding the nut.
Adrian Houser, Milwaukee Brewers
You’d be excused for not getting excited about Adrian Houser as a prospect; he was never especially enthralling in the minors. What was exciting, however, was Houser’s two-seamer/sinker, which he used to great effect in 2019. Pitch-classification algorithms can have issues with a pitcher like Houser, but while he upped his grounder game considerably last season — useful for a right-handed pitcher given Miller Park’s history as a haven for left-handed sluggers — he did it while avoiding the somewhat dated approach of simply constantly throwing hard and down.

Houser did have considerable splits last year depending on his role, with a 4.57 ERA as a starter compared to 1.47 in relief. But in a rotation that seems overstuffed with third and fourth starters, Houser’s upside is interesting.
Dinelson Lamet, San Diego Padres
One thing people forget about Dinelson Lamet is how little experience he actually has as a pitcher, with only 500 professional innings under his belt. I think there’s a good chance that if not for the Tommy John surgery, he’d be a legitimate ace right now for the Padres; his change was a work in progress at the time. Lamet has been 16 runs below-average with his mid-to-upper 90s fastball — which came back faster post-surgery — but I don’t think this is a case of Nathan Eovaldi, a pitcher who had trouble turning his velocity into outs. Lamet just hasn’t the time to refine his potent fastball-slider combination yet.
Luis Urías, Milwaukee Brewers
It strikes me as odd that in some circles Luis Urías is already thought a bust despite just turning 23. After sitting out the spring with a recovering from surgery on a broken hamate bone, Urías’ poor injury luck has continued; he tested positive for COVID-19 prior to the Brewers’ intake procedure for training camp. His case was reported to be asymptomatic and while we have little practical evidence of how cases like that will affect elite athletes, Craig Counsell appeared optimistic about Urías’ chances of rejoining the team in fairly short order. Urías had a disappointing stint in the majors in 2019, but even taking a huge chunk out of his .315/.398/.600 Triple-A effort due to the league offense and the level, there’s strong evidence that his baseline is well above his .223/.329/.326 major league line last year.
Victor Robles, Washington Nationals
It seems a little weird with the benefit of hindsight, but Victor Robles was always supposed to be the new hotness before Juan Soto exploded onto the roster in 2018. Robles isn’t going to catch up to Soto any time soon — or likely ever — but he showed signs of being a fairly complete hitter as a prospect and his defense in center field has been about as good as advertised. His main problem remains that he makes very soft contact, especially on groundballs, and I think his tendency to be overaggressive on the first pitch and top a soft grounder is hurting him here; he just doesn’t have the contact skills of a David Fletcher. Victor Robles will never hit for power like a Joey Gallo, but better pitch selection would give him a shot at retaining his 2019 home run bump. Too much of his current plate discipline comes from simply being willing to take a hit by a pitch.
Dansby Swanson, Atlanta Braves
Poor Dansby Swanson is at risk of becoming the new Gregg Jefferies, a player who is always measured versus our lofty initial expectations, found wanting, and ends up underrated by “only” being a B+ player in the majors. Swanson hit the ball harder in 2020 than he ever had before in the majors, with his barrel rate more than doubling his 2017 and ’18 numbers and his weak contact hits dropping considerably. It didn’t show up in his overall stats, but ZiPS “thought” he should actually have been a .492 slugger instead of the .422 mark he posted. zSLG isn’t an outlier, either; Statcast’s xSLG had Swanson at .480.
Dylan Bundy, Los Angeles Angels
My working theory on Dylan Bundy is that he needed a change of scenery more than practically any pitcher in the majors, both figuratively in terms of coaching and literally in terms of a park better configured to contain his mistakes. Bundy came out of high school nearly a decade ago as a hard thrower, a pitcher who regularly hit the high-90s and was clocked at 100 as an amateur. Years of injuries killed off the fastball, but Bundy continued to pitch as if he was still that pitcher, aggressively challenging hitters with a 91-92 mph four-seamer. That doesn’t actually work against major league hitters; for his career, he’s allowed a .542 SLG on four-seamers, including a .574 in 2018 and a .642 in 2019.
Bundy has to reinvent himself the way Frank Tanana did after his injury. There were signs of progress at times in 2019, with Bundy trying to change speeds more often. I still think there’s upside here if the Angels convince Bundy that his comps fall along the lines of Doug Fister, not Randy Johnson.
Byron Buxton, Minnesota Twins
Byron Buxton thrived last season when the Twins finally did what they’d resisted doing for years: sticking him in the lineup, letting him play, and not panicking every time he had a bad week. ZiPS gives Buxton a 10% chance at a 130 OPS+, enough that it would make him a superstar when combined with his defense. The shoulder is a concern, but he’s also had the luxury of more time to recover because of the pandemic’s long layoff.
Mitch Keller, Pittsburgh Pirates
I can’t think of a scenario in which Mitch Keller’s .475 BABIP in 2019 represents an actual ability. I’m not convinced that Mitch Webster, coming out of retirement and converted to pitching, would allow a .475 BABIP. Historically, hitters being dragooned as pitchers have a BABIP allowed in the .330 range, which I think sets a soft ceiling of minimal pitching competence. But it was such a wacky number that even ZiPS is having trouble coping and I’d take the under on the .328 projection, even with Keller having similar issues in the minors, though not to the same extreme. Like Lamet above and my eternal example, Kevin Gausman, I think Keller really needs an offspeed pitch he can count on, but the talent is there. It’s hard to strike out 12 batters a game and have no idea what you’re doing.
Tyler Anderson, San Francisco Giants
There’s a chance that this is personal bias since his windup always gives me nightmares in MLB: The Show, but Tyler Anderson was always on the verge of breaking out as command-type pitcher in Coors and with a better outfield defense and a friendly park in San Francisco, I think he could have a Kirk Rueter-type run of success. And yes, I know he’s more of a strikeout pitcher than Rueter — the comp isn’t perfect. Having the extra time to recover from major knee surgery will be helpful, I feel.
These are my breakout candidates. Next, I’ll reveal the sad side of the coin: the breakdowns.
Dan Szymborski is a senior writer for FanGraphs and the developer of the ZiPS projection system. He was a writer for ESPN.com from 2010-2018, a regular guest on a number of radio shows and podcasts, and a voting BBWAA member. He also maintains a terrible Twitter account at @DSzymborski.
So this could be the year that Houser becomes known as a pitcher instead of just a hurler.
Belly itcher
Jimenez had an interesting arc last year. He saw very few fastballs when he first came up and looked like he was trying to hit homeruns. So the few he hit were mistakes on the outer half and went a mile to straightaway center. But he wasn’t hitting all that many and was hitting a lot of ground balls so they kept throwing soft/away. Eventually he realized that he could hit a ball out of any part of any park just by hitting it in the air so he just lofted those outside pitches and was hitting home runs to right and right center that were fly balls that just never came down because he has so much natural, effortless, power. Late in the year pitchers realized that he could do that easily and started to throw him harder stuff inside. That’s when he hit a few long HR to left, but they still largely pitched him atypically away for a 22 year old rookie.
Add to that the fact that his timing seemed off and it took him longer to get it back than most guys do any time he missed time with injuries, which happened a couple of times. He just really looked like a guy with a ton of natural power, lots of ability, and a need to learn how to hit major league pitching and not just feast easily on less talented minor league stuff. If that last part happens, he could really be a monster. And he is still only 23, so it is reasonable to think it will happen.
Maybe it’s just me but I think Jimenez and Robles are gimmes. They are just so talented and young enough that we still think they could break out.
OTOH, Swanson, Bundy, and Buxton probably are what they are–average.
Buxton was worth almost 3 wins in under 300PA last year. The durability is a real concern, but it isn’t like he hasn’t shown some superstar upside when he’s been on the field. And that was with a 110 wRC+.
Alright, that’s fair. I just don’t believe he is going to keep it up, but he does have a shot to be a star.
Swanson and Bundy are 2-win guys today and 2-win guys tomorrow.
There are still pretty wide bars around his true talent as a hitter, no doubt. He may always be streaky. It isn’t that hard to imagine a Mike Cameron type peak if he can stop hurting himself, though. 110 to 120 WRC+ and spectacular defense in center is a pretty dang good player.
Of course the best shape of your life narrative rarely means much, but he was absolutely jacked this spring. Of course as a man who relies on defense for his value I am unsure if that is a good thing.
Last year was the first time Buxton showed any improvement at all against righties, and it was both slightly better discipline and more power. If he can be even close to an average hitter against righties, he’ll be a very good player overall.
I was shocked when I looked at Houser’s data how good everything looked…the guy just suffocated contact and had a nice K/BB ratio to boot. The guy absolutely crushed last year. I don’t know if it was just a hot streak or not but he looks like a possible 3-win pitcher.
Urias, on the other hand…I don’t know if he’s going to bust or not, but I don’t really see him as “breaking out.” He might be able to get by on his contact skills to be a steady contributor but he really lacks power, and pitchers are going to challenge him.
I would consider establishing yourself as a steady contributor in the major leagues as breaking out. At least that’s how I interpreted this article. I’m not sure if that’s what Dan’s saying or if he’s saying “these are my five picks to have star level seasons.”
Could a blind squirrel find Mitch Haniger’s nuts?
Shocked to learn Haniger jokes are nut funny.
All these thumbs down…makes me feel like Haniger at Christmas when he sees The Nutcracker.
Unfortunately, I think the top breakout candidate for the season is Coronavirus if they decide to play.
I think you’re confusing breakout with outbreak
Hot takes:
– I may like both Peralta and Burnes more to break out on the Brewers’ staff. That said, I do think Houser is under the radar and important to them being competitive
– I’m pretty excited about Buxton’s 2023 FA…Don’t sign an extension! Come play for the Cubs, maybe! If still need of assistance the Hitting Lab, which utilizes math and science and technology, will do the trick!
– Ian Happ, Kyle Schwarber, and Willie Calhoun: all guys who are about to mash
Yeah I don’t agree on Happ or Schwarber, but I know you’re a Cubs fan so maybe you just need something to hold on to.
Burnes was unplayable last year, but he has great stuff and some good peripherals so there’s always a shot. Peralta, I’m afraid, is never going to repeat his delivery well enough to be good.
Drew Rasmussen will break out before Peralta does.
Why the homer assumption on Schwarber and Happ? Both mashed in the second half last year, Schwarber’s rocking a .900+ OBP over almost 500 PAs. High EVs, lots of fly balls, high walk rates, and reduced strikeout rates are things both guys did. Former top ten picks, in the MLs not long after the draft, maybe 24 and 26 YOs are this point, already had starter quality seasons…what’s homerish there? Schwarber is Calhoun swapping some contact for better defense and walk rates
Burnes and Peralta are two guys with alot of outstanding performance in the minors, have clean arms, have already had ML success, have the stuff to succeed, are with a smart org, and are 24 and 25….The younger Peralta IMO can be a first division SP still
Others I like:
Julio Teheran – Same general profile as Bundy – former elite prospect and early arrival turned averageish SP getting a change of scenery in a park and with an OF that might tolerate his flyball tendencies better…The Angels arm to like might secretly be Patrick Sandoval
Cole Tucker – A 6’2″ switch hitting SS with secondary skills on offense and probably some defensive versatility if pushed
Jesse Winker – Talk about a guy who might benefit from the DH
Cody Reed – Has the arm to be an impact LHRP for the Reds, power stuff from the former starter, maintained some SP potential as recently as 2018
AJ Puk – Pre-TJ IMO was the top SP prospect in baseball, looking forward to inevitable trade to the 2024 Cubs
Danny Jansen – Either he breaks out offensively or is one of the best change of scenery trade candidates this offseason, other Blue Jays include Trent Thornton and Sean Reid-Foley
Probably others
Agree with some, and I don’t agree with some. Puk seems to be overlooked and I agree with him. Winker still will have to battle for at bats as that offense is deep. Thornton as well as Turnbull seem to be potential breakout arms. Disagree on Tucker however. I remember I saw his first MLB home run and thought it was a pitcher batting. Might be the ugliest swing I have ever seen. I realize that people make things work for different reasons, and some hitters have ugly swings, but this guy swing looks horrendous.
I am really not seeing the Gregg Jefferies comparison for Swanson… Swanson wishes he was anywhere near as accomplished as Jefferies was at the same age.
After his age 25 season, Jefferies was coming off a 142 OPS+ for the Cardinals, and has a career OPS+ of 116 over 3000 plate appearances. In other words, he was well established as being able to hit.
Swanson just put up an 89 OPS+, coming off years of 87 and 68. Even putting aside Swanson’s obvious defensive advantage, he’s not even in the same ballpark as Jefferies was as a player…
Agreed. Jefferies was also one of the most highly-touted prospects that MLB has seen in the last 40 years. He was a scout’s dream at 16 years old. At 19 years old, in AA, he slashed .367 / .423 / .598 and added 26 steals. Dansby Swanson has disappointed compared to expectations, which were high, but nothing like what was expected of Jefferies.
Comparing Swanson with Jefferies is like comparing apples and chili beans. Stephen Drew is probably a better target for the analogy Dan was making for Swanson.