Matt Waldron reportedly throws first knuckleball in Washington Nationals history

Matt Waldron reportedly threw the first knuckleball in Washington Nationals franchise history, per beat reporter Mark Zuckerman, who posted the observation from the ballpark on Wednesday.

What happened

Zuckerman, who covers the Nationals, noted the moment in real time, adding a caveat that he could not rule out some position player having messed around with one at the end of a blowout at some point in franchise history. Setting that narrow asterisk aside, Waldron's delivery appears to stand as the first genuine knuckleball thrown in a Nationals game — a pitch that, by its nature, tends to announce itself.

The conditions Zuckerman described: mostly cloudy, 84 degrees at Nationals Park. Not that the knuckleball particularly cares about the weather, but it is the kind of atmospheric detail that feels appropriate when a pitch this unusual makes its reported franchise debut.

Why it matters

The knuckleball is one of baseball's most singular offerings — a pitch thrown with minimal spin, designed to move unpredictably on its way to the plate, and one that has largely vanished from the modern game. Its practitioners have always been rare; its franchise debuts, rarer still. The fact that a team playing in its current form reached this milestone in 2026 is less a commentary on the Nationals than a reminder of how thoroughly the pitch has faded from the sport's everyday vocabulary.

Waldron is listed as the probable starter for Wednesday's game against the Colorado Rockies at Nationals Park. Whether the knuckleball was a one-pitch curiosity, a situational weapon, or something Waldron intends to deploy with regularity is not addressed in Zuckerman's report. What is reported is that it happened — and that a beat writer who has watched a considerable amount of Nationals baseball found it notable enough to flag immediately.

The numbers

Waldron takes the mound for Washington against Colorado's Tanner Gordon on Wednesday, August 26, at Nationals Park. The Nationals enter that game at 67-77 (.465), sitting 4th in the NL East, 18 games back of the division leader, and ranked 9th in the Wild Card picture — 8.5 games relative to the cut line. They have dropped their last three in a row.

Those standings do not make Wednesday's start a high-leverage postseason audition. They do make it a reasonable laboratory. When a team is 18 games out of the division and 8.5 back of a Wild Card spot with the calendar turning toward September, the question of what a pitcher can do becomes at least as interesting as whether the team wins on a given Tuesday. A knuckleball debut fits that context neatly.

Where the club stands

At 67-77, the Nationals are a team playing out a season rather than chasing one. Fourth place in the NL East, an L3 streak, and a Wild Card rank of 9 — these are not the numbers of a club in the thick of things. The upcoming home series against Colorado runs through Thursday, with Jake Irvin scheduled against Gabriel Hughes on August 27, before Miami and Eury Pérez come to Nationals Park on August 28 with Jackson Kent as Washington's probable.

The roster will expand from 26 to 28 players on September 1 under standard league rules, which tends to give clubs in Washington's position some flexibility to experiment and evaluate. That context does not change what Waldron reportedly threw on Wednesday, but it does frame the moment: this is a franchise in a stretch of the season where discovery is the point.

Was this actually the first knuckleball in Nationals history?

Per Zuckerman's report, almost certainly — with one reported caveat. Zuckerman himself acknowledged he could not be entirely certain no position player had thrown one informally at the end of a lopsided game somewhere in the franchise's history. That is the kind of honest uncertainty that makes the claim credible rather than undermining it. A beat writer who has covered this team closely enough to flag the moment is also careful enough to note what he might have missed.

What Zuckerman did not hedge on: this was a real knuckleball, thrown in a real game situation, not a novelty toss. That distinction matters. Position players occasionally take the mound in blowouts and throw whatever their arm produces; a starting pitcher deploying a knuckleball as part of his repertoire is a different category of event entirely.

What we don't know yet

Zuckerman's report does not specify when during the game the pitch was thrown, what the count or situation was, what the result was, or whether Waldron has thrown the pitch before in professional settings. It is not reported whether this is a pitch Waldron has been developing, whether the Nationals organization encouraged its use, or whether it will appear again in his next start or ever. The report is a moment, not a scouting file.

It is also worth noting that Zuckerman's confidence level is his own — he is a reporter making an observation in real time, not the franchise issuing a historical certification. If someone has archival evidence of an earlier Nationals knuckleball, Zuckerman's framing leaves room for that.

What to watch

The most immediate question is whether Waldron throws it again — in this start, in his next one, or at all. A single reported knuckleball is a data point; a pattern would be a story. Waldron is scheduled to face Colorado on Wednesday, which means there will be eyes on his pitch mix regardless.

More broadly, the Nationals' remaining schedule — Colorado at home, then Miami — offers a stretch of games where the club can continue to learn what it has in its rotation. Irvin follows Waldron on Thursday, and Kent gets the ball Friday against Pérez. None of that changes because of one reported knuckleball, but the pitch is now part of the conversation around what this staff is and what it might become.

The knuckleball has a way of doing that. It shows up once, floats across the plate in its unhurried, unpredictable way, and suddenly everyone wants to know where it came from and whether it is staying. Per Mark Zuckerman, it came from Matt Waldron, on a mostly cloudy 84-degree afternoon at Nationals Park. Whether it is staying is, at this point, entirely unknown.