The Arizona Diamondbacks might have the best middle-infield duo in MLB, which is something most people outside of their fanbase probably aren’t aware of. Mike Hazen didn’t disagree when I suggested as much to him in Las Vegas.

“We’ve always dealt with that,” the D-Backs general manager replied. “We play on the West Coast — we play late for the East Coast — and we’re not on national TV a lot, so it comes with the territory. But yeah, [Geraldo] Perdomo probably had a top-five season in all of baseball this year, and [Ketel] Marte does it every year. With those two guys, along with [Corbin] Carroll, I think we have three of the top 25-30 guys in all of baseball.”

That was certainly the case in 2025. Carroll, the club’s right-fielder, ranked seventh-best in MLB with 6.5 WAR, while the keystone combination came in at fifth-best (Perdomo at 7.1) and 24th-best (Marte at 4.6) respectively. Productive bats were a big reason for that. Carroll put up a 139 wRC+, Perdomo was a tick below at 138, and Marte was fourth-highest in the senior circuit at 145.

How long Arizona’s middle infield will remain intact is currently in question. Rumors that Marte — on tap to gain 10-5 rights in the coming season — could be traded have been circulating, and while Hazen has reportedly said that moving the 32-year-old second baseman is “mostly unlikely,” he has also acknowledged a need to listen to offers. Howe many of those he has received to this point is unknown, but given Marte’s résumé — the three-time All-Star has a 140 wRC+ and 15.3 WAR over the past three seasons — the return would be noteworthy. Read the rest of this entry »

We’re less than a month from the Winter Meetings and the Rule 5 Draft, which means it’s a good time to evaluate every team’s 40-man roster situation. This is the time of year when teams have one final chance to protect Rule 5 eligible players by placing them on the 40-man. Eligibility is determined by a mix of how long a player has been with their parent organization and how young they were when they signed: Players who signed at 18 or younger must be added to the 40-man within five seasons, while everyone else must be added within four. RosterResource monitors Rule 5 eligibility, if you’re curious to see the lay of the land.

During the season, teams can free up roster space by placing an injured player on the 60-day IL. In the offseason, teams don’t get extra slots for injured players, which tends to put pressure on the back of the roster. The Diamondbacks are a good example of how space can tighten quickly, as they’ve currently got six pitchers battling long-term injuries occupying a spot. You may have noticed a flurry of moves immediately following the World Series, with many teams outrighting players off the 40-man in order to make room for all the guys who were on the IL.

Below, I’ve assessed every National League team’s 40-man roster situation (Eric will sort through the American League tomorrow). Some teams, like the Braves, have plenty of roster space, and thus a lot of flexibility in adding whoever they like. Others, like the Cardinals and Marlins, will face some tough choices as they seek to balance protecting interesting prospects with retaining players already on the roster, as well as finding room for prospective additions via trade or free agency. Some clubs don’t have many impact players to add, while others may need to protect a half-dozen or so guys. I’ve tried to identify which players are most likely to be added, which guys on the 40-man are vulnerable to getting lopped off in a roster crunch, and who could be moved in a deal to free up roster space. Let’s dig in. Read the rest of this entry »

Daylen Lile was one of the top rookie performers in the senior circuit this season. The 22-year-old outfielder debuted with Washington Nationals in late May and went on to slash .299/.347/.498 with a 132 wRC+ over 351 plate appearances. Displaying a combination of speed and power, Lile legged out 11 triples and left the yard eight times. A ninth home run on his ledger was an inside-the-parker.

When I talked to him in September, I learned that Lile and Nationals teammate James Wood were doing a lot of drill work together in the batting cage. Left on the cutting room floor from our conversation— the ensuing feature can be found here — was what he told me about the work itself. Like most good hitters, Lile is diligent about his routine.

“Your preparation matters, because what happens there translates to the game,” he said. “Mechanically, I still have the same swing I had [when entering pro ball in 2021], although I have changed a few things. I started getting my foot down early to see pitches longer, and now I’m doing a toe-tap for more rhythm, getting synced with the pitcher.”

And then there is the routine itself. Lile has been doing his “movement-prep stuff,” since coming back from UCL surgery, which cost him the 2022 season. Getting his body loose and keeping it that way throughout a long season is an integral part of his process. As you might expect, the work he does in the batting cage is every bit as important. Read the rest of this entry »

Direct links to applications (please see job details below):

Analytics Intern, Baseball R&D (2026 Season)
Software Engineering Intern, Baseball R&D (2026 Season)

Analytics Intern, Baseball R&D (2026 Season)

Summary:
The Washington Nationals are seeking analytics interns to join our Baseball Research & Development team for the 2026 season. As an analytics intern, you’ll work on developing and applying your data science skills to baseball, performing research on baseball questions under the close mentorship of a team member of Baseball R&D. You’ll likely work on one project at a time, with plenty of time for model exploration and personal development. You’ll have the opportunity to work in a collaborative baseball front office daily at the stadium, watching baseball and engaging regularly with more senior members of our baseball operations group.

Internships are a key way for us to find future full-time members of our department, with many of our senior department members beginning as interns. While a pathway to a full-time position is not assured, many of our former interns have found full-time opportunities with the Nationals or other MLB clubs. We have availability for both summer internships and full season internships, with some flexibility on start dates.

The Washington Nationals are committed to creating a diverse and inclusive work environment and are proud to be an equal opportunity employer. The listed qualifications serve as guidelines rather than strict requirements. We encourage all enthusiastic candidates to apply, especially those from non-traditional backgrounds and historically marginalized or underrepresented groups. We will consider applications without regard to race, color, religion, national origin, sex, age, marital status, personal appearance, sexual orientation, gender identity or expression, family responsibilities, matriculation, political affiliation, genetic information, disability or veteran status.

Essential Duties and Responsibilities:

• Use R to build statistical models to answer a primary baseball research question under the direction of a Baseball R&D team member
• Communicate findings through written reports, presentations, and informal conversations
• Design and build informative data visualizations for use in automated reports or internal web applications

Requirements:

Education and Experience Requirements

• Experience analyzing datasets and training statistical models using R, Python, or equivalent
• Has or is pursuing an undergraduate or graduate degree from a four-year college or university, preferably in Data Science, Statistics, Mathematics, Computer Science or related field
• Willingness to relocate to Washington, DC
• Authorized to work in the United States

Knowledge, Skills, and Abilities necessary to perform essential functions

• Ability to complete statistical modeling projects
• Ability to listen and incorporate feedback, collaborate with others
• Enthusiasm for learning new skills related to programming, statistical modeling, and data visualization
• Passion for baseball and desire to work in baseball operations
• Working knowledge of sabermetrics and modern quantitative baseball evaluation concepts
• Demonstrate key personal qualities that contribute to a high-performing team environment. These include bringing joy and positive energy to daily work, maintaining humility and curiosity, acting with integrity and accountability, and embracing a competitive mindset focused on continuous improvement and shared success.

Physical/Environmental Requirements

• Occasional long hours may be required during draft, trade deadline, or postseason.
• Interns can attend all home games but are not required to. Meals are provided to staff during games.

Compensation:
The projected wage rate for this position is $17.95 per hour. Actual pay is based on several factors, including but not limited to the applicant’s: qualifications, skills, expertise, education/training, certifications, and other organization requirements. Starting salaries for new employees are frequently not at the top of the applicable salary range.

Equal Opportunity Employer:
The Nationals are dedicated to offering equal employment and advancement opportunities to all individuals regardless of their race, color, religion, national origin, sex, age, marital status, personal appearance, sexual orientation, gender identity or expression, family responsibilities, matriculation, political affiliation, genetic information, disability, or any other protected characteristic under applicable law.

To Apply
To apply, please follow this link.

Software Engineering Intern, Baseball R&D (2026 Season)

Summary:
The Washington Nationals Baseball Research & Development group is seeking a Software Engineering Intern to join our team for the 2026 season. Our group builds the data and software systems that power the Nationals’ decision-making across the baseball organization — from front-office analysis to player development processes, coaching decisions, and scouting evaluations.

As an intern, you’ll contribute directly to these systems by helping design data pipelines, APIs, and web applications used throughout our baseball operations department. Depending on your background and interests, you’ll have opportunities to focus on data engineering, web development, or a blend of both.

We have opportunities for both a summer-only internship (3-months) and a longer internship (6-months), with flexibility in starting dates. This internship is in-person in Washington, DC.

Essential Duties and Responsibilities:
The responsibilities will be some combination of the following, depending on whether the intern is focused on data engineering or web development.

• Build data imports and data pipelines using Prefect.
• Add functionality to our internal API microservice, implemented in FastAPI.
• Design and build interactive data-driven web pages using Vue.js and Ruby on Rails.
• Write documentation.

Requirements:

Education and Experience Requirements

• Has or is pursuing an undergraduate or graduate degree from a four-year college or university, preferably in Computer Science or related field.

Knowledge, Skills, and Abilities necessary to perform essential functions

• Enthusiastic about working in baseball.
• Ability to work both collaboratively and independently with close attention to detail.
• Experience with modern programming languages (e.g. Python, Ruby, JavaScript, or similar) and with SQL.
• Some experience working on the command line in a Linux-like environment.
• Some experience using git for version control.
• Experience using AI-assisted coding tools (e.g., GitHub Copilot, ChatGPT, Gemini, Claude, Cursor) to accelerate development.
• Experience with some of the following technologies is preferred:
• Data frameworks: Pandas, Polars
• Web frameworks: FastAPI, Flask, Node.js/Express, Ruby on Rails
• Front-end frameworks: React, Vue.js
• Data Visualization frameworks: D3.js, Plotly
• Workflow orchestration tools: Prefect, Dagster, Airflow
• Ability to communicate clearly and effectively.
• Authorized to work in the United States.

Physical/Environmental Requirements

• Office: Working conditions are normal for an office environment. Work may require occasional weekend and/or evening work. Occasional long hours may be required during the draft or trade deadline.
• Interns can attend all home games but are not required to. Meals are provided to staff during games.

Application Process
Approximately 10% of applicants will be invited to complete a take-home programming assignment, designed to take about 10 hours and to be completed within a 10-day window. We will review these submissions and invite selected candidates to participate in one or more video interviews.

Compensation:
The projected wage rate for this position is $17.95 per hour. Actual pay is based on several factors, including but not limited to the applicant’s: qualifications, skills, expertise, education/training, certifications, and other organization requirements. Starting salaries for new employees are frequently not at the top of the applicable salary range.

Equal Opportunity Employer:
The Nationals are dedicated to offering equal employment and advancement opportunities to all individuals regardless of their race, color, religion, national origin, sex, age, marital status, personal appearance, sexual orientation, gender identity or expression, family responsibilities, matriculation, political affiliation, genetic information, disability, or any other protected characteristic under applicable law.

To Apply
To apply, please follow this link.

The content in this posting was created and provided solely by the Washington Nationals.

Mike Burrows was rated as having the best curveball in the Pittsburgh Pirates system when I talked to him to for our old Learning and Developing a Pitch series back in 2022. Then a highly-regarded prospect, the 25-year-old right-hander relied heavily on his hook, a pitch that Eric Longenhagen assigned a 70 on the scouting scale and described as having “devastating bite and depth.” Our lead prospect analyst referred to it as his “meal ticket.”

Burrows is now a bona fide big-leaguer, but not because of a bender. Pitching in his first full MLB season — he made one appearance in 2024 — Burrows threw his erstwhile go-to just 11.9% of the time while logging a 3.94 ERA and a 24.1% strikeout rate over 96 innings. He’s evolved into split-change artist. Burrows threw what has become his most-used secondary pitch at a 23.7% clip this year. Moreover, he did so to the tune of a .147 BAA, a .220 slug, and a 43.1% whiff rate.

Why and how did he go from a killer curveball to a bat-missing splitter variant?
Read the rest of this entry »

A lot of different types of players get sent to the Arizona Fall League by their parent clubs: prospects who have lost time due to injury, org arms there to soak up enough innings for the league to function, guys eligible for the Rule 5 Draft whose teams aren’t yet sold on putting them on the 40-man roster, and, quite often, the most talented and exciting players in minor league baseball. It’s a rich and robust tapestry.

Now that the league’s action has commenced, one use of the AFL is to provide a sort of decontextualized look at some of the players whose strong performance in 2025 was already cause for some re-evaluation. Here’s one player from each AFL roster who arrived with some helium, prompting us to ask if they’ve changed their scouting report, or are just progressively improving into the player we expected.

Glendale Desert Dogs
Sam Antonacci, 2B, White Sox
2025 FV: Honorable Mention

Not only did the White Sox trade for Chase Meidroth months after giving Antonacci a slightly over-slot bonus in the fifth round of the 2024 draft, their Double-A Birmingham affiliate won the Southern League while slotting Antonacci in as the third straight feisty little bat-to-ball maven at the top of their lineup behind Rikuu Nishida and William Bergolla. At six feet, he’s a bit taller, but similar to Meidroth, below-average thump and a dearth of the athleticism necessary to drive a shortstop projection cooled early scouting reads for Antonacci, and he was an honorable mention for us on the White Sox list in April. Despite only playing his junior season there after two years of Division II ball, Antonacci is so Coastal Carolina-pilled that 35 hit by pitches form a substantial part of the .433 OBP he held over his first full pro season. (That he has yet to be plunked in his first three AFL games has to be, one would imagine, a source of deep personal disappointment.) Read the rest of this entry »

Welcome to the final Five Things I Liked (Or Didn’t Like) This Week of the year. As we prepare to leave the normal cadence of regular season baseball behind, we’re all already mentally preparing for the madcap pace of the playoffs, when the games are fewer but more momentous. This last week is more of a transitional phase; some of the series are monumentally important, while others feature the Royals and Angels (just to pick a random set) playing out the string. Maybe this is the best time for baseball, actually. If you’re looking for it, there’s more drama in the back half of September than in any other regular season month. But if you just want silly baserunning in inconsequential games, or role players making the most of big opportunities, there’s plenty of that too. I love October baseball, but I’ll be sad when September ends.

Of course, no Five Things intro would be complete without me thanking Zach Lowe of The Ringer for the format I’ve shamelessly copied. So Zach, I hope your Mets fandom isn’t too painful this week. To the things!

1. Playoff Races
Obviously. If this isn’t the thing you like most in baseball this week, you’re probably a Mets or Tigers fan, and even then, you’re probably lying to yourself a little. The thrill of a pennant race coming down to the wire is one of the great joys of this sport. Most of the time, I like baseball because no single outcome matters all that much. Lose a game? Play the next day. Strike out in a big spot? Everyone does that sometimes. Give up a walk-off hit? I mean, there are 162 games, you’re going to give up some walk-offs. But every so often, as a treat, it’s fun when the games suddenly transmute from seemingly endless to “must have this next one.”

Has the new playoff format played a role here? It’s hard to argue it hasn’t. This is the fourth year of the 12-team field, and it’s the fourth straight year with an unsettled playoff race in the last week of the season. It’s the third straight year with multiple good races, in fact. That’s not exactly unimpeachable evidence – the final year of the old format saw its own thrilling conclusion to the regular season – but the point is that when the last week of the regular season is filled with drama, it makes for a great playoff appetizer. I’m still unsure what the new format does to the competitive structure of the game, and I haven’t liked the way trade deadlines work when the line between contender and pretender is so hazy. But in late September, it sure seems to be giving me more of what I want. Read the rest of this entry »

The Nationals will remember 2025 as a gap year, if they’re lucky. The 2023 and 2024 teams, invigorated by many of the prospects acquired in the Juan Soto trade, each won 71 games, dragging Washington out of the bottom-of-table ignominy that it had occupied since winning the World Series in 2019 and then blowing up the roster. This year’s squad is going to finish with a win total in the 60s and some developmental hiccups, a step backward from the recent past. But lost in the broadly disappointing year is one bright shining beacon: Daylen Lile might just be a keeper.

Lile, a high school draftee in 2021, missed all of 2022 rehabbing from Tommy John surgery, then spent the next two years methodically climbing through the minor league ranks. He started 2025 hot, with a .337/.383/.509 line in his first 40 games in the minors, and got his first taste of the majors when Jacob Young briefly hit the IL. Lile struggled during that first stint but landed in the majors for good a few weeks later when the Nats overhauled their bench. By the All-Star break, he’d carved out a role as a rotational right fielder.

That’s the boring part of this article. The exciting part? As Lile settled into big league life, opportunity beckoned. Young scuffled. Alex Call got traded. Dylan Crews was still out with injury. Lile? He just kept hitting. By August, he was locked in as a starter, and why not? Since the break, he’s hitting a sensational .323/.371/.552 for a 153 wRC+, and turning heads with his aggressive approach and hair-on-fire baserunning. Move over, other baby Nats – there’s a new top youngster in town.

Lile’s game is built around a sensational feel to hit. He regularly ran gaudy contact rates in the minor leagues, and his zone contact rate in the majors is above 90%, squarely in the upper echelon of the league. Like many hitters who make a ton of contact, Lile likes to swing. Unlike those peers, though, he’s done a good job of avoiding the over-chase downward spiral that traps so many singles hitters into lunging at sliders off the plate. Read the rest of this entry »

By the time the first half of the season ended, Pete Crow-Armstrong appeared to be a lock to join the 30-home run, 30-stolen base club. Elected to start the All-Star Game in center field for the NL in his first full major league season, the 23-year-old phenom had already totaled 25 homers and 27 steals. Things have not come easily since then, however; with one week to go in the regular season, Crow-Armstrong is stuck on 29 home runs, though he does have 35 stolen bases.

It was a fruitful weekend for joining the 30/30 club, with Jazz Chisholm Jr. doing so on Friday, José Ramírez on Saturday, and Corbin Carroll on Sunday; the three of them joined — improbably enough — Juan Soto. This is the fifth season in which four players have attained the dual milestones, and the second in three years, aided by the rules changes that have accompanied the introduction of the pitch clock. Any one of Crow-Armstrong, Julio Rodríguez (who has 31 home runs and 28 stolen bases), Francisco Lindor (28 HR, 31 SB), or Randy Arozarena (27 HR, 28 SB) reaching their needed thresholds would set a major league record.

Although Crow-Armstrong didn’t start against the Reds on Sunday, he came off the bench and had two chances to join the party. He flied out in one and, with the tying run at second base and two outs in the ninth, struck out looking at a borderline four-seamer to end the game. Read the rest of this entry »

Daylen Lile has been swinging a hot bat. Over his last nine games, the 22-year-old outfielder is 16-for-37 with a double, four triples, and two home runs. Moreover, he’s been one of the top position player rookies in the National League this season. Since debuting with the Washington Nationals in late May (and subsequently receiving a second call-up after a 10-day return to the minors in June), Lile has a 114 wRC+ to go with a .282/.327/.450 slash line over 286 plate appearances. His 74 base knocks include 13 two-baggers, eight three-baggers, and five round-trippers.

How well he’ll perform going forward is a good question. Ranked fifth with a 45 FV when our Nationals list came out in early July, the 2021 second round pick out of Louisville’s Trinity High School was described by Eric Longenhagen as a player whose “most important attributes are his hand-eye coordination and his bat control.” Our lead prospect analyst went to say that he has Lile “graded as a contact-oriented platoon bat.”

The youngster’s left-handed stroke did a lot of damage — albeit not of the fence-clearing variety — down on the farm. In 47 games between Double-A Harrisburg and Triple-A Rochester, Lile slashed .328/.377/.503 with four home runs and a 143 wRC+ over 213 plate appearances. That he’s heated up since getting off to a slow start in the bigs — a 56 wRC+ and a .571 OPS through his first 20 games — isn’t exactly a surprise. Read the rest of this entry »