Archive for Starting Pitchers

2022 Review: Pitcher xERA Underperformers

Last week, I discussed the hitters who underperformed their Statcast xwOBA marks most. Given that projection system typically weigh historical results in some fashion to compute an upcoming season forecast, it’s possible that list includes some hitters who may be underprojected. So let’s now turn to the pitching side. We’ll start by reviewing the starting pitchers who recorded at least 150 innings that most underperformed their Statcast xERA mark. Note that based on my calculations, the league xERA was 4.03, versus a 3.97 actual ERA. So on average, pitchers slightly overperformed their xERA marks.

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Recipe: Thinning The Herd With K/9, SwStr%, and pVals – Part 1

Sticky metrics refer to statistics that are highly correlated from year to year. Here’s an example. Among all qualified pitchers in 2022, Jordan Montgomery ranked 11th with a 12.9% swinging strike rate (SwStr%). Bringing the innings-pitched threshold down to 150 in 2021, he ranked ninth with a career-high 13.7%:

Jordan Montgomery's SwStr%

In every season except 2018, he’s had an above-average SwStr%. Projections don’t predict SwStr%, but if they did you could imagine that Montgomery would easily be projected above 12%.

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Pablo López Joins the Twins

Last Friday, the Twins acquired starting pitcher Pablo López from the Marlins. After spending his entire career in Miami, how might his new park affect his performance? Let’s consult the park factors to find out.

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Deep League Starting Pitchers (Miller, Lorenzen, Brash, Gibson, & Harrison)


Somedays You Have It And Somedays You Don’t: Robbie Ray’s Slider

Troy Taormina-USA TODAY Sports

It has always been difficult for me to understand pitcher volatility. Well, the volatility part isn’t hard to understand, actually, it’s very simple. Pitching in the big leagues is incredibly difficult and one tiny little element of a pitcher’s game could be off to make the whole outing unravel. But, what is hard to understand is what little element that is. Did a 1 mph drop on a four-seamer really make it all go south? Or, was it a matter of half an inch of location? Is it even measurable? Like, what if it was just bad gas from the previous night’s chimichanga that threw things off? Do you see where I’m going? I want to know why a pitcher does so well one day and so poorly the next. For my first round of this, I’ll start slow and focus on only one pitch, narrowing the question down to, why does one pitch perform well one day and bad the next? In today’s investigation, I’ll analyze and compare Robbie Ray’s July 3rd 2.6 wSL Pval (Pitch Info) with his July 24th -3.4 wSL pVal. Let’s have some fun.
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Deep League Starting Pitchers (Pfaadt, Skubal, Smyly, Muller, & Cavalli)

I am examining starters going later than pick 300 in the latest NFBC ADP.

Here are the previous editions:

Brandon Pfaadt (384 ADP)

The 24-year-old Diamondbacks prospect is getting a ton of hype coming into the 2023 season. Baseball American has him ranked as the team’s fourth-best prospect after a season where he posted a 2.63 ERA, 0.99 WHIP, and 10.8 K/9 over 61 IP in the high-scoring PCL. In AA last season, his performance was worse with a 4.53 ERA, 1.25 WHIP, and 12.3 K/9. The jump in the ERA is from a 1.6 HR/9 and .370 BABIP. Read the rest of this entry »


Deep League Starting Pitchers (Kluber, Irvin, Márquez, & Boyd)

I am examining starters going later than pick 300 in the latest NFBC ADP.

Here are the previous editions:

Corey Kluber (438 ADP)

The 36-year-old threw decent last season with a 4.34 ERA (3.85 SIERA), 1.21 WHIP, and a 7.6 K/9. After dealing with injuries for a few seasons, he was able to make 31 starts and get 10 Wins.

He’s lost quite a bit of velocity off his sinker (3% SwStr%, 39% GB%) over the past few seasons but he just threw it 25% of the time this past season.

The sinker is horrible but he’s completely backed off its usage with his cutter being his primary pitch. Now, his three non-fastballs get a decent amount of swing-and-miss.

Pitch: SwStr%, Usage
Cutter: 14%, 34%
Slider: 14%, 27%
Change: 19%, 10%

I just don’t see any upside unless he regains some velocity or completely backs off throwing the sinker. If he can stay healthy, he should be a decent part-time streamer.

Cole Irvin (448 ADP)

I feel like I’m right in the middle of the sub-par volume options. Irvin threw 181 innings of 3.98 ERA and 1.16 WHIP ball with a 6.4 K/9. Even with the low strikeout rate, he had the 75th most strikeouts last season and volumed himself to the 146th best pitcher. Depending on the league’s depth, he was either a bench or waiver wire streamer.

Looking forward, the 28-year-old lefty doesn’t have much upside.

He is already not walking anyone with a 1.8 BB/9 last season and a 2.1 BB/9 during his career. His best pitch is his 91-mph four-seamer with a 12% SwStr% and a 31% GB%. Its results are better than 90% of all fastballs in the game. The swinging-strike rate on all the rest of his pitches is lower than his fastball. His change and slider were both at an 11% SwStr%.

One change he could make is to ditch his sinker (25% usage, 5% SwStr%, 42% GB%) and just go four-seam, change, and slider. If he kept their combined swinging strike rates, he would have similar results as Zack Wheeler (11% SwStr%, 2.0 BB/9) and Julio Urias (11% SwStr%, 2.1 BB/9). I doubt he’ll make such a radical adjustment, so it’ll be another boring year 180 below-average innings.

Germán Márquez (450 ADP)

There is no reason to roster any Rockies pitchers besides closers and that includes Marquez. He posted a 7.4 K/9 and 3.1 BB/9. Those stats are comparable to the two pitchers above. Marquez has the disadvantage of throwing half his starts in Colorado therefore his rate stats get pushed up (4.95 ERA, 1.37 WHIP) so compared to those going around, he needs to be ignored.

There is probably a point when his road starts against weak opponents come into play, but so three to four starts during the season. Marquez and his supporting cast aren’t good enough to push his value any higher. Looking over the entire NFBC, I would value him sometime after a 650 ADP.

Matthew Boyd (454 ADP)

Boyd missed most of the 2022 season while recovering from Tommy John surgery. He returned in September in time to make 10 relief appearances. While he posted a 1.35 ERA (1.61 BABIP) during that stretch, he did so with a 5.4 BB/9 (Zone% down from 53% before the surgery to 47%).

He was throwing his pitches about 0.5 mph harder than before and using them at about the same rate. The one except would be a sinker he threw 15% of the time. The last time he threw a sinker that much was back in 2017.

Overall, it should be a nice groundball pitch with his own 2018 sinker coming in as a comp. Maybe the sinker will help keep the home runs under control (career 1.6 HR) especially with his home fences moving in.

It’s tough to know what to expect from him next season. The lack of control is concerning, but many pitchers struggle with control when returning from Tommy John surgery. I just don’t see a reason to gamble on a pitcher with a career 4.90 ERA in ~800 IP.


Deep League Starting Pitchers (Nelson, Turnbull, Martinez, & DeSclafani)

Kiyoshi Mio-USA TODAY Sports

I am examining starters going later than pick 300 in the latest NFBC ADP.

Here are the previous editions:

Ryne Nelson (429 ADP)

There are a lot of possible outcomes for the 24-year-old righty. His results in 18 major league innings seemed great (1.47 ERA, 0.82 WHIP), but he was buoyed by an unsustainable .156 BABIP. The arrows with him are going in all directions. I’ll start with the negatives. Read the rest of this entry »


Nathan Eovaldi’s Bowl To Be Filled With Cowboy Soup Now, Instead of Clam Chowder

Last Tuesday, the Rangers signed Nathan Eovaldi to a two-year, $34 million contract. While I love New England Clam Chowder and assume Eovaldi enjoyed many bowls of the delicious soup during his four and a half seasons with the Red Sox, he might now be salivating at the prospect of filling his belly with Texas Cowboy soup, which sounds just delightful. Entering his age 33 season, how might the change in home venue affect his results? Let’s consult the park factors to find out.

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Deep League Starting Pitchers (Rodriguez, Pivetta, Hall, & Germán)

Brad Penner-USA TODAY Sports

I am examining starters going later than pick 300 in the latest NFBC ADP.

Here are the previous editions:

Eduardo Rodriguez (305 ADP)

The 29-year-old Rodriguez missed most of last season because of personal reasons. He missed an additional three weeks because of a strained ribcage. Even with the missed time, he was able to make 17 starts. Here are his results from before and after his time off. Read the rest of this entry »