Whether it’s because they’re only just getting healthy or someone ahead of them has gotten hurt or their talent is kicking down the doors of roster manipulation made brittle by actual competitive spirit, some potentially important participants in postseason play are currently in the minors as we speak. This is especially likely when it comes to pitching, where health and effectiveness are tenuous, and team behavior surrounding promotion tends to be more opportunistic and aggressive.

For both leagues, I’m providing a scouting-centric update on pitching currently in the minors, either because the players are prospects who could conceivably play a September role or make a postseason roster, or because the player in question is a rehabbing big leaguer. Pitching can be streaky and fragile, so any of these guys could be in the big leagues at the drop of a hat, or they may simply convince their front office, like several rookies did last year, that they’re one of the best 26 guys in the org and need to be put on the playoff roster. The level of impact could range from Hunter Greene or Shane Baz dominating like Francisco Rodriguez in 2002, to Connor Seabold or Thomas Hatch humbly eating innings in a blowout loss in effort to save the rest of the bullpen for the series’ next game like J.A. Happ in 2008.

I’ll touch first on the American League this week, then provide some National League options next week. If any prospects moved on The Board due to info or opinions brought to light from this piece, I’ll note that below.

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These are notes on prospects from Tess Taruskin. Read previous installments of the Daily Prospect Notes here.

MJ Melendez, C, Kansas City Royals
Level & Affiliate: Triple-A Omaha Age: 22 Org Rank: 13 FV: 40+
Line: 2-for-4, HR, K, BB

Notes
Melendez’s four-bagger in Wednesday’s game was his 31st on the season, which ties him with Griffin Conine atop the minor league home run leaderboard.

As an added narrative wrinkle to their ongoing homer chase, Conine’s father (former big-leaguer Jeff Conine), is now an assistant coach at Florida International University under Melendez’s father, Head Coach Mervy Melendez. While the playful, multi-generational rivalry between the father-son duos makes for a compelling storyline, there’s plenty more to be gathered from Melendez’s performance this year, much of which adds significant shine to his prospect apple. Read the rest of this entry »

With the elimination of the waiver deadline, the last two months of the season (or more accurately now, the last six weeks) can leave front office personnel feeling like little more than helpless observers. Problems at the big league level, whether of the health or performance variety, are going to pop up, but for the most part, the answers to those problems have to come from within. Yes, there’s the occasional player who gets designated for assignment who deserves consideration, but otherwise teams will either lean on the depth they’ve spent much of the year trying to establish or curse the risks they took in terms of depth in order to improve their big league roster. Here are the depth situations for the American League playoff contenders, with the National League to follow tomorrow.

American League East

Tampa Bay Rays
Strengths: The Rays bolt together pitching staffs as well as any team in baseball, and there are plenty more pieces available to them at Triple-A Durham should the need arise. They load up on pitch-data darlings while also developing plenty from within, and the result has been the best record in the International League, with their staff generating a team-wide strikeout rate of over 28%. With five current Durham pitchers already on the 40-man roster, managing innings down the stretch shouldn’t be an issue, be it for need or just for the purposes of keeping players fresh. In terms of position players, Vidal Bruján continues to slot in all over the diamond; his ability to play six positions makes him the most likely hitter to be called up. Read the rest of this entry »

When Eloy Jiménez and Luis Robert both went down with serious injuries earlier this season, the White Sox had to scramble to cover for two of their best outfielders. Andrew Vaughn, a corner infielder by trade, was thrown into the fire as their Opening Day left fielder, and when Robert went down a month later, the options were even thinner. To make matters even more complicated, the other member of their projected preseason outfield trio, Adam Eaton, was released by the club right before the All-Star break. Despite all this turnover and turmoil, White Sox outfielders have been worth a cumulative 7.1 WAR this year, the fifth highest mark in the majors. With both Jiménez and Robert back from the injured list much earlier than expected, Chicago suddenly has outfield options to spare.

Amazingly enough, Jiménez has already accounted for 0.8 WAR in just 13 games since being activated a few weeks ago. He’s been used as the designated hitter seven times, with three of his appearances in left field coming during an interleague series against the Cubs. With Robert taking his place as the everyday center fielder, the White Sox have four or five different options to deploy in their outfield corners. When Jiménez lines up in the field, Vaughn has been used as the designated hitter or shifted over to right field. Considering the difficult circumstances Vaughn was thrown into at the start of the season, his 2021 has to be seen as a huge success. The other day, Luke Hooper broke down the swing adjustment he made in late June that has led to a surge in production over the last month and a half. Even though he hasn’t contributed very much in the field, his bat is clearly good enough to stick in the lineup as the everyday starter in left. Read the rest of this entry »

The White Sox have built a commanding lead in the American League Central. They’re now 10 1/2 games ahead of second-place Cleveland and have a 99.9% chance of going to the playoffs according to our Playoff Odds. They were heavily favored to win the division going into the season, but the club has had to overcome some significant adversity (most notably early season injuries to Eloy Jiménez and Luis Robert) en route to the secure position they currently hold. And even beyond injuries, the roster was not without its questions, with one big one being how Dylan Cease would perform in his first full season in the rotation.

Cease’s 2020 campaign produced mixed results. On the surface, his 4.01 ERA, 5-4 record, and 44 strikeouts across 58.1 IP was decent. But he drastically outperformed his expected statistics, and it was hard to imagine he could maintain that ERA given his elevated walk rate (13.3%) and home run rate (1.85 HR/9), not to mention his 6.36 FIP. Cease has always had great stuff. As a prospect, his fastball graded as a plus to plus-plus pitch, with his breaking ball sniffing 60-grade territory; the question was how well he could control and command his repertoire. And while his 2020 peripherals suggested his performance this season would regress, there was a lot of optimism surrounding Cease prior to the start of the season. In spring training, Yasmani Grandal stated, “I feel like if we get him to where we see him going, this guy could be a Cy Young finalist — he could possibly be a Cy Young winner.” Read the rest of this entry »

Position: Sports Biomechanics Analyst

Location: Glendale, AZ
Duration: Full-Time

Position Overview:
The Chicago White Sox are searching for a passionate individual to expand their biomechanics and sports science capabilities. As a Sports Biomechanics Analyst, you will lead and coordinate the collection and analysis of motion capture data at the team’s Glendale pitching and hitting labs while also integrating markerless and wearable technologies and data sets. The analyst will work closely with the player development, sports science, and R&D teams to develop actionable training and insights to accelerate development paths, achieve peak performance, and reduce injury risk. Read the rest of this entry »

In late June, Chicago White Sox rookie and 2019 third overall pick Andrew Vaughn had a 13-game stretch where he struck out 31% of the time with a 15.1% swinging strike rate. This slump brought his season-long wRC+ down to 91 and his K-rate up to 27.2%. It was a disappointing start to the career of a prospect who was seen as having a great hit tool and had always had below-average strikeout rates in the minors. That stretch culminated in a three-game series against the Mariners that saw Vaughn strike out four times in eight plate appearances and wave through 20% of the pitches he saw:

The White Sox had a day off the next day and by the time their next series against the Twins started on June 29, Vaughn had snapped out of his funk. In fact, he didn’t whiff a single time in the series against Minnesota. When watching his swing in that series, you could notice an adjustment beginning to take shape. Focus on his hands, compared to the swings you saw above:

Vaughn’s ability to make contact has continued and since June 29, his swinging strike rate is an elite of 6.3% — that’s Juan Soto territory. Now that we are into August, Vaughn’s new hand load has solidified further, making it easier to see the difference compared to his early season swings. Here’s a better look at the adjustment:

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What a ride this year’s deadline was. All told, we had 75 prospects move in the last month. They are ranked below, with brief scouting reports written by me and Kevin Goldstein. Most of the deals these prospects were a part of were analyzed at length on this site. An index of those pieces can be found here, or by clicking the hyperlink in the “Trade” column below. I’ve moved all of the players listed here to their new orgs over on The Board, so you can click through to see where they rank among their new teammates. Our farm rankings, which now update live, also reflect these changes, so you can see where teams’ systems stack up post-deadline.

A couple of quick notes before I get to the rankings. We’ve included a few post-prospect players here (those marked in blue) so you can get an idea of where we value them now as opposed to where we had them at their prospect peak. Those players, as well as the Compensatory pick the Rockies will receive after they extend Trevor Story a qualifying offer and he signs elsewhere, are highlighted below. We had closer to 40 prospects (and 23 Players to be Named Later) traded last year, with the PTBNL number inflated by 2020’s COVID-related transaction rules. The backfields are not well-represented here, with just four prospects who have yet to play in full-season ball. Two of those are currently in the DSL and have no official domestic pro experience, though Alberto Ciprian has played stateside for instructs/extended spring training. Now on to the rankings. Read the rest of this entry »

Some moves are made for getting a team to the playoffs or helping them win a fight for the division. But with the largest lead of any first-place team in baseball in a division where all the other teams are either treading water or selling, the White Sox could basically stick their roster on cruise control and maybe casually stop off and grab a sandwich. But even with the advantage that is the AL Central, they did make a trade on Friday, and it’s about one very specific thing: brutally destroying any hopes or dreams of late-inning comebacks for any playoff opponent who is behind in the late innings. By acquiring closer Craig Kimbrel from the Cubs for second baseman Nick Madrigal and pitcher Codi Heuer, they’ve done just that; pairing him with Liam Hendriks and the rest of what’s already a good bullpen is as frightening as any slasher-movie antagonist.

Kimbrel is having his best season in a long time, with a microscopic 0.72 ERA, 1.08 FIP, and 64 strikeouts in 36 2/3 innings to go with his lowest walk rate since 2017. Given his poor first two seasons with the Cubs that were full of both command issues and injury setbacks, some may worry about a possible pumpkinification for the 33-year-old righty. I’m not. ZiPS and the other projection systems all saw quite a bit to like even in Kimbrel’s pedigree, enough to consider him at least an adequate reliever coming into 2021. And there’s little whiff of a fluke in this season’s stats; with a rebounding first-strike rate and batters having their least effective contact year ever, ZiPS thinks that his strikeout and walk rates are right in line with how well he’s actually pitched.

Kimbrel is succeeding the way he did in the old days: a blazing fastball and a knuckle-curve located where batters both have trouble keeping the bat on their shoulders and actually hitting it. Unlike a nasty slider where the goal is to make the batter look foolish on a pitch that is a zip code away, Kimbrel’s knuckle-curve needs to be a borderline pitch. When he can’t spot it, it’s ineffective, as it was in 2019 and ’20. This year, he’s got the heat map of olden days.

Does adding Kimbrel give the White Sox the best bullpen in baseball? ZiPS thinks so, and when our depth charts are fully updated, I suspect they’ll show up at the top there as well. That could be the case next season, too, as Kimbrel is not a pure rental for the White Sox unless they want it to be. With a $16 million option and a $1 million buyout for 2022, it’s basically a one-year, $15 million decision. The White Sox certainly have the ability to pay that should they end up happy with this signing.

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The White Sox and Cubs swung a trade on Thursday, with the South Siders acquiring righty reliever Ryan Tepera from their crosstown counterparts. In exchange, the Cubs received left-handed relief prospect Bailey Horn.

The move is a comparatively small one for both teams, with the White Sox adding ever-so-desired relief depth, while the Cubs focus on trading their more important pieces; Anthony Rizzo is on his way to the Yankees, and possible deals for Kris Bryant and Craig Kimbrel still loom. But, as a seller, it never hurts to get some of the smaller trades out of the way, and a solid reliever on an expiring contract fits the bill.

Tepera, 33, might best be known to fans outside of Chicago for his errant 18th-place finish on the 2020 NL MVP ballot, but he is having a pretty successful season. He has a career-best 2.79 FIP thanks to a strikeout rate that’s above 30% for just the second time in his career (2020 was the first) and a 7% walk rate. That 23.0% strikeout-minus-walk rate doesn’t put him at the top of the reliever leaderboards, but ranking 29th out of the 163 qualifiers is nothing to sniff at, either. He’s riding a 2.91 ERA and while his FIP would suggest that is more or less sustainable, we could raise his .196 BABIP allowed and 7.7% HR/FB rate as a slight concern. But other ERA estimators think Tepera’s propensity to avoid hard contract is legit. Just look at his sterling expected statistics from Statcast:

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