JAWS and the 2025 Hall of Fame Ballot: Mark Buehrle and Andy Pettitte

The following article is part of Jay Jaffe’s ongoing look at the candidates on the BBWAA 2025 Hall of Fame ballot. For a detailed introduction to this year’s ballot, and other candidates in the series, use the tool above; an introduction to JAWS can be found here. For a tentative schedule and a chance to fill out a Hall of Fame ballot for our crowdsourcing project, see here. All WAR figures refer to the Baseball-Reference version unless otherwise indicated.

It’s no secret that we’re in the midst of a lean period for starting pitchers getting elected to the Hall of Fame on the BBWAA ballot. Since the elections of 300-game winners Tom Glavine, Greg Maddux, and Randy Johnson in 2014 and ’15, just four starters have gained entry via the writers, two of them alongside the Big Unit in the latter year (Pedro Martinez and John Smoltz) and two more in ’19 (Roy Halladay and Mike Mussina). From a demographic standpoint, Halladay is the only starter born after 1971.

It’s quite possible the writers won’t elect another starter born in that shag-carpeted decade unless voters come around on Andy Pettitte (b. 1972) or Mark Buehrle (b. 1979), a pair of southpaws who cleared the 200-win mark during their exceptional careers, producing some big moments and playing significant roles on championship-winning teams. Yet neither of them ever won a Cy Young award, created much black ink, or dominated in the ways that we expect Hall-caliber hurlers to do. Neither makes much of a dent when it comes to JAWS, where they respectively rank 93rd and 91st via the traditional version, about 14 points below the standard, or tied for 80th and 78th in the workload-adjusted version (S-JAWS). Neither has gotten far in their time on the ballot, and both lost ground during the last cycle. Pettitte maxed out at 17% in 2023, his fifth year of eligibility, but slipped to 13.5% in his sixth, while Buehrle, who peaked at 11% in his ’21 debut, fell from 10.8% to 8.3%. Nobody with shares that low at either juncture has been elected by the writers, with Larry Walker (10.2% in year four, 15.5% in year six) accounting for the biggest comeback in both cases but still needing the full 10 years, capped by a 22-point jump in his final one.

After updating both pitchers’ profiles for the 2023 cycle, I’ll stick to excerpting them while resharing an idea I had last year, one that additionally pertains to first-year candidates Félix Hernández and CC Sabathia.

Mark Buehrle (8.3% on 2024 ballot)

From the intro:

At a moment when baseball is so obsessed with velocity, it’s remarkable to remember how recently it was that a pitcher could thrive, year in and year out, despite averaging in the 85–87-mph range with his fastball. Yet thats exactly what Mark Buehrle did over the course of his 16-year career. Listed at 6-foot-2 and 240 pounds, the burly Buehrle was the epitome of the crafty lefty, an ultra-durable workhorse who didn’t dominate but who worked quickly, used a variety of pitches — a four-seamer, sinker, cutter, curve, changeup — moving a variety of directions to pound the strike zone, and relied on his fielders to make the plays behind him. From 2001 to ’14, he annually reached the 30-start and 200-inning plateaus, and he barely missed on the latter front in his final season.

August Fagerstrom summed up Buehrle so well in his 2016 appreciation that I can’t resist sharing a good chunk:

The way Buehrle succeeded was unique, of course. He got his ground balls, but he wasn’t the best at getting ground balls. He limited walks, but he wasn’t the best a limiting walks. He generated soft contact, but he wasn’t the best at generating soft contact. Buehrle simply avoided damage with his sub-90 mph fastball by throwing strikes while simultaneously avoiding the middle of the plate:

That’s Buehrle’s entire career during the PITCHf/x era, and it’s something of a remarkable graphic. You see Buehrle living on the first-base edge of the zone, making sure to keep his pitches low, while also being able to spot the same pitch on the opposite side of the zone, for the most part avoiding the heart of the plate. Buehrle’s retained the ability to pitch this way until the end; just last year [2015], he led all of baseball in the percentage of pitches located on the horizontal edges of the plate.

Drafted and developed by the White Sox — practically plucked from obscurity, at that — Buehrle spent 12 of his 16 seasons on the South Side, making four All-Star teams and helping Chicago to three postseason appearances, including its 2005 World Series win, which broke the franchise’s 88-year championship drought. While with the White Sox, he became just the second pitcher in franchise history to throw multiple no-hitters, first doing so in 2007 against the Rangers, then adding a perfect game in 2009 against the Rays. After his time in Chicago, he spent a sour season with the newly-rebranded Miami Marlins, and when that predictably melted down, spent three years with the Blue Jays, helping them reach the playoffs for the first time in 22 years.

Though Buehrle reached the 200-win plateau in his final season, he was just 36 years old when he hung up his spikes, preventing him from more fully padding his counting stats or framing his case for Cooperstown in the best light.

More here.

Andy Pettitte (13.5% on 2024 ballot)

From the intro:

As much as Derek Jeter, Jorge Posada, Mariano Rivera, and Bernie Williams, Andy Pettitte was a pillar of the Joe Torre-era Yankees dynasty. The tall Texan lefty played such a vital role on 13 pinstriped playoff teams and seven pennant winners — plus another trip to the World Series during his three-year run with Houston — that he holds several major postseason records. In fact, no pitcher ever started more potential series clinchers, both in the World Series and the postseason as a whole.

For as important as Pettitte was to the “Core Four” (Williams always gets the short end of the stick on that one) that anchored five championships from 1996 to 2009 — and to an Astros team that reached its first World Series in ’05 — he seldom made a case as one of the game’s top pitchers. High win totals driven by excellent offensive support helped him finish in the top five of his leagues’ Cy Young voting four times, but only three times did he place among the top 10 in ERA or WAR, and he never ranked higher than sixth in strikeouts. He made just three All-Star teams.

Indeed, Pettitte was more plow horse than racehorse. A sinker- and cutter-driven groundballer whose pickoff move was legendary, he was a championship-level innings-eater, a grinder (his word) rather than a dominator, a pitcher whose strong work ethic, mental preparation, and focus — visually exemplified by his peering in for the sign from the catcher with eyes barely visible underneath the brim of his cap — compensated for his lack of dazzling stuff. Ten times he made at least 32 starts, a mark that’s tied for seventh in the post-1994 strike era. Within that span, his total of 10 200-inning seasons is tied for fourth, and his 13 seasons of qualifying for the ERA title with an ERA+ of 100 or better is tied for first with two other lefties, Mark Buehrle and CC Sabathia. He had his ups and downs in the postseason, but only once during his 18-year career (2004, when he underwent season-ending elbow surgery) was he unavailable to pitch once his team made the playoffs.

Even given Pettitte’s 256 career wins, he spent the first four years of his candidacy overshadowed by two other starters on the ballot (Roger Clemens and Curt Schilling) who were better at missing bats and preventing runs, and who also had plenty of postseason success. Both of those pitchers offered reasons for voters to exclude them from their ballots even while finding them statistically qualified, and the same is true for Pettitte, who was named in the 2007 Mitchell Report for having used human growth hormone to recover from an elbow injury.

More here.

If you need a refresher, the idea behind S-JAWS, which can be found all over Baseball Reference in the same places as JAWS, is to reduce the skewing caused by the impact of 19th-century and Deadball-era pitchers, some of whom topped 400, 500, or even 600 innings in a season on multiple occasions. The way I’ve chosen to do this is by prorating the peak-component credit for any heavy workload season to a maximum of 250 innings, a level that the current BBWAA candidates rarely reached; among active pitchers, only Justin Verlander has, albeit by a single inning more than a decade ago. Given the current trends in the game regarding starting pitcher usage, five or 10 years from now, evaluating candidates on a 200- or 225-inning basis might make more sense, but I think this is a reasonable place to start the adjustments.

Hall of Famers as a group lose an average of 9.1 WAR in the adjustment of their peak WARs and an average of 4.6 points in the conversion from JAWS to S-JAWS. That lowers the standard from 61.4 to 56.9. It doesn’t cost either of these two lefties, who topped out in the 240ish-inning range, anything score-wise, but Pettitte still winds up 9.7 points south of the S-JAWS standard, and Buehrle is 9.5 points shy.

I’m reluctant to start scaling those peak seasons down even further because it will cut into the scores of these candidates, but given that I’ve been discussing the scarcity of viable Hall starters for quite some time — see here and here for some relatively recent thoughts on the topic — I’ve wondered what it would take to find a JAWS-driven reason to support these candidates. Consider this a thought experiment that one could use as ballot guidance if so inclined; what I’m about to illustrate is an attempt at something akin to gerrymandering or reverse engineering to produce a desired outcome.

Before showing you how this turned out, I’ll reiterate that there’s more to any candidate’s Hall of Fame case than just WAR and JAWS, and that I’ve outlined both pitchers’ portfolios within the aforementioned profiles; they include the good stuff as well as the bad. For Pettitte, that includes his admission of using HGH in 2002, which falls in the “Wild West” era where PEDs weren’t tested for and, in this case, when the substance in question was legal and not banned by baseball until 2005. Still, I wanted to see if I could get these two pitchers within hailing distance of some line, and if that helped improve the outlook for upcoming candidates.

Instead of further scaling down peak score, I’ve explored using a percentile rank threshold. I’ve always used the means of Hall of Famers’ career WAR, peak WAR, and JAWS to determine the standards instead of the medians, not only because the latter are often higher (which isn’t the case for pitchers, actually), but also because where the means of career and peak WARs add up to produce the mean of JAWS, that doesn’t happen with the median. It’s messy.

A JAWS that averages the means of career and peak is just JAWS, and the same goes for S-JAWS, but a JAWS or S-JAWS that averages the medians of the two components is a different number (mJAWS above) from the medians of either flavor. To avoid confusion and clutter, for this thought experiment I’m going to ditch the components and just focus on the median JAWS and its percentiles. Here’s how Pettitte and Buerhle stack up in both versions; as points of comparison, I’m also throwing in the percentile rankings for Sabathia, Hernández, two-time Cy Young winner Johan Santana (who went one-and-done amid an overstuffed 2018 ballot), and the most recent 200-game winner, Adam Wainwright (eligible in 2029):

That… isn’t tremendously encouraging, but it does at least show this pair of southpaws somewhere in the second quartile, but still well behind Sabathia, a pitcher I intend to support and will profile in my next installment. If you’re wondering about active pitchers, the top one is Verlander (65th percentile in original JAWS, 75th in S-JAWS), just nosing out Clayton Kershaw (64th and 73rd), with Max Scherzer (58th and 68th) and the absent-from-2024 Zack Greinke (61st and 70th) also well ahead of anyone mentioned in my Best Starting Pitchers Outside the Hall series from 2022 (I, II, III, IV).

Last year, in a longer version of this experiment, I explored recalculating the percentiles while excluding all of the pitchers whose careers began before 1893 (the year that the 60-foot-6 distance was established), then did the same thing using the Baseball Reference Stathead cutoff dates, namely 1900 (Modern Era), 1920 (Live Ball Era), 1947 (Integration Era), and 1961 (Expansion Era). To summarize, using the 1893 or 1900 cutoffs boosted some of those 21st-century pitchers by a percentile or two, but the rest did not, because the Hall of Famers aren’t evenly distributed throughout the JAWS rankings.

Long story short, if we’re examining current and future candidates in the light of S-JAWS, I don’t think the chronological cutoffs help much, but the percentile rankings themselves may have some merit. If you’re comfortable with the prospect of electing pitchers such as Pettitte and Buehrle who are in the lower part of the second quartile by this methodology, fair enough; I’m not going to egg anyone’s house for including them on their ballots (and to be clear, I wasn’t egging anyone’s house before either). In fact, I included Pettitte myself for the first time last year. I haven’t figured out if I will repeat that this year, particularly with Sabathia having a much stronger justification for the spot.