Imagine two of the best young starting pitchers in the sport, both 27 years old, both drafted in the same class, both close friends away from the field — and imagine that, despite years of overlapping careers in the same league, they had never once started a game against each other. Then imagine a rainout pushes their long-awaited first meeting back by a single day, and by the time it finally happens, scouts from three different Major League Baseball organizations are sitting in the stands specifically to watch it unfold. That is exactly what happened on August 29, 2026, at Jamsil Stadium in Seoul, when Doosan Bears right-hander Kwak Bin and Kiwoom Heroes right-hander An Woo-jin faced off in a KBO League regular-season start for the first time in league history. Both pitchers touched 99-plus miles per hour. One of them set a new career velocity high in the first inning. And when it was over, one ace had a quality start and a win, while the other had a career-worst kind of night by his own standards — but the story of the day was never really about the final score. It was about two of the game’s brightest arms, on the same stage, at the same time, with the sport’s biggest league watching from the stands.
The Duel
This matchup was not supposed to happen on August 29. It was originally scheduled for August 28, but rain forced a postponement, pushing the Doosan Bears-Kiwoom Heroes game back exactly one day and shifting the ace-versus-ace pairing along with it. In most seasons, in most leagues, a rainout is a minor scheduling inconvenience — a game gets pushed, a bullpen gets reshuffled, and life goes on. But this particular postponement happened to preserve something that had never occurred before: a KBO regular-season start pitting Kwak Bin directly against An Woo-jin, the two pitchers most frequently mentioned in the same breath as the best right-handed starters in Korean professional baseball.
That “first-ever” detail matters more than it might initially seem. Both pitchers came up through the KBO in the same draft class. Both have spent years building reputations as the two most electric right-handed arms in the league. And yet, whether through scheduling quirks, injuries, roster timing, or simple bad luck, their paths as starting pitchers had never crossed on a mound in a real regular-season game — not once. For a league that plays a full slate of games across a long season, that kind of gap is unusual enough on its own. It meant that when Doosan and Kiwoom finally lined up their rotations to put both pitchers on the mound on the same day, the game immediately became bigger than a single set of standings points. It became a landmark.
Jamsil Stadium, one of the KBO’s most recognizable venues and a frequent host of the league’s biggest moments, provided the setting. And once first pitch finally arrived — a day later than planned, but with the moment fully intact — both pitchers wasted no time showing why this particular matchup had generated so much anticipation in the first place.
Two Aces, One Draft Class
Part of what makes this story resonate is the relationship between the two pitchers off the mound. Kwak Bin and An Woo-jin are both 27 years old, both born in 1999, and both entered the KBO through the same draft class. They have effectively grown up in professional baseball together, moving through the league’s ranks in parallel, and by most accounts, they are close friends away from the ballpark. That combination — genuine friendship paired with genuine rivalry for the unofficial title of the league’s top right-handed arm — is part of what gives this matchup its emotional charge. This wasn’t two strangers meeting for the first time. It was two players who have likely spent years watching each other’s outings, comparing notes, and quietly measuring themselves against the other’s numbers, finally sharing a mound as direct opponents rather than parallel storylines.
American readers can think of this in terms of the way top prospects from the same draft class are sometimes tracked against each other for years before ever meeting as opponents — two players whose careers are constantly compared, whose statistics are perpetually stacked side by side, and who each carry a piece of “best of their generation” expectation on their shoulders. Kwak Bin and An Woo-jin have effectively been living that dynamic in the KBO, and August 29 was the day the comparison stopped being hypothetical and started being literal — decided, at least for one day, on the same field, in the same game, at the same time.
An Woo-jin, in particular, has carried an especially compelling arc into this moment. He has long been regarded as one of the most talented arms to come through the KBO in years, and his path back to the top of the league’s pitching conversation has not been a straight line. Without rehashing the full details of that journey here, it’s worth noting that his return to frontline ace form is part of what makes his presence in this specific duel so significant — this was a pitcher squarely back in form, sharing a mound with the other name most commonly used in the same sentence as “best right-handed starter in Korea.” Kwak Bin, for his part, has quietly built his own case for that same title over the past several seasons, developing into one of Doosan’s most reliable frontline starters and a pitcher opposing lineups now approach with real caution.
Put those two threads together — a shared draft class, a real friendship, and two competing claims to the same unofficial crown — and you get a matchup that was always going to draw more attention than a typical midweek start. The rainout that pushed it back a day only added a little more anticipation to a game that was already circled by anyone paying close attention to the KBO’s pitching landscape.
The Radar Gun War
Anticipation is one thing. Delivering on it is another. On August 29, both pitchers delivered in a way that turned this from an interesting storyline into a genuinely historic radar-gun moment for the league.
Kwak Bin opened the game by setting a new career-high fastball velocity right out of the gate, touching 160.3 kilometers per hour in the first inning — approximately 99.6 miles per hour in the units most American fans are used to seeing. For context, that is elite, top-of-the-scale velocity in any professional baseball league in the world, the kind of number that would make a scouting report note flash red-flag exciting no matter which country’s league it came from. And Kwak Bin didn’t just touch that number once in a bullpen session or a showcase environment — he hit it in a live regular-season inning, against a real opposing lineup, in the first frame of one of the most anticipated starts of his career.
An Woo-jin was not about to let that number stand unanswered. Pitching opposite Kwak Bin in the same game, he matched him blow for blow, reaching a fastball velocity of 160.0 kilometers per hour — roughly 99.4 miles per hour. The two numbers sitting side by side, separated by just three-tenths of a kilometer per hour, essentially amount to a dead heat at the absolute top of what a human arm can do with a baseball. Two pitchers, on the same mound, in the same game, both sitting at the very outer edge of triple-digit territory in miles-per-hour terms. It is difficult to overstate how rare it is for two starting pitchers in the same game to both flash numbers at that level — in any league, American or otherwise.
The final pitching lines tell a slightly different story than the radar gun did, and that’s part of what makes this game complete as a piece of baseball drama rather than just a velocity showcase. Kwak Bin turned his statement fastball into a full-fledged quality start, working six innings and allowing two earned runs, and he was credited with the win. An Woo-jin, despite matching him nearly pitch for pitch on the radar gun, had a tougher afternoon by the numbers, going five innings and allowing five earned runs in a start that ultimately went down as the loss. Velocity and results don’t always move in lockstep in baseball — a pitcher can sit at the top of the velocity charts and still have his stuff hit hard on a given day — and this game was a clean example of exactly that. Both men threw as hard as almost anyone in the sport. Only one of them left with a win.
That gap between “who threw harder” and “who pitched better on the day” is worth sitting with. An Woo-jin’s final line doesn’t erase what he showed on the radar gun, and Kwak Bin’s win doesn’t mean he was untouchable — six innings and two runs is a strong, winning start, not a shutout. What the box score really shows is two frontline aces, both operating at the peak of their physical talent, with one of them landing on the right side of the results column on this particular day. In a rivalry defined as much by parallel careers as by any single outcome, that distinction between “who threw harder” and “who won” is likely to matter for bragging rights long after the box score is filed away.
Why MLB Scouts Showed Up
None of the above happened in a vacuum, and it didn’t go unnoticed outside of Korea, either. Scouts from at least three Major League Baseball organizations — the Los Angeles Dodgers, the New York Yankees, and the San Diego Padres — were in attendance at Jamsil Stadium specifically to watch this game in person. That is not a small detail. Three MLB franchises, each with global scouting departments and the resources to be virtually anywhere in the world on any given day, made the specific choice to have representatives physically present for this particular start, on this particular date, watching these two particular pitchers.
For American readers unfamiliar with the KBO, the easiest way to understand the significance of that scouting presence is to think of it the way you’d think about a marquee showcase event for top draft-eligible prospects, or the kind of high-profile look teams give a top international free agent before a posting or negotiation. When multiple MLB front offices independently decide a single regular-season game in another country’s domestic league is worth an in-person scouting trip, that’s a strong signal about how the industry views the talent on display — not a guarantee of anything specific happening next, but a clear marker that both pitchers are firmly on the radar of clubs that spend enormous resources evaluating exactly this kind of talent.
It’s worth being precise about what is, and isn’t, confirmed here. The reporting on this game establishes that scouts from these three organizations attended in person to watch Kwak Bin and An Woo-jin pitch against each other. It does not establish specific transfer timelines, posting plans, contract talks, or anything beyond the fact of their attendance. What it does establish is a very real, very concrete data point: some of the most sophisticated talent evaluation departments in professional sports considered this particular matchup important enough to physically show up for. Given that both pitchers were independently touching 99-plus miles per hour in the same game, it isn’t difficult to understand why.
There’s also a broader signal embedded in this story about where the KBO sits in the global baseball conversation right now. A league that produces two same-age, same-draft-class, friend-and-rival aces who can both sit at the top of the velocity charts in the same game is a league that MLB evaluators clearly feel obligated to keep close tabs on. Whatever happens next in either pitcher’s career, August 29’s duel at Jamsil Stadium will likely be remembered as one of the moments that underlined just how much high-end arm talent is currently active in Korean professional baseball.
The Quick Facts
- Matchup: Kwak Bin (Doosan Bears) vs. An Woo-jin (Kiwoom Heroes), KBO League regular season
- Date and venue: August 29, 2026, at Jamsil Stadium, Seoul — originally scheduled for August 28, postponed one day by rain
- Historic first: The first time in KBO regular-season history these two pitchers have started against each other
- Shared background: Both pitchers are 27 years old, born in 1999, entered the KBO in the same draft class, and are close friends off the field
- Reputation: Both are widely regarded as the top two right-handed starting pitchers in Korea
- Kwak Bin’s velocity: New career-high fastball of 160.3 km/h (about 99.6 mph), recorded in the first inning
- An Woo-jin’s velocity: Matched with a fastball up to 160.0 km/h (about 99.4 mph)
- Kwak Bin’s final line: Win, quality start — 6 innings pitched, 2 earned runs
- An Woo-jin’s final line: Loss — 5 innings pitched, 5 earned runs
- MLB scouting presence: Scouts from the Los Angeles Dodgers, New York Yankees, and San Diego Padres attended the game in person
Source: MoneyToday, Ilgan Sports, Sports Khan
Frequently Asked Questions
Why was this the first time Kwak Bin and An Woo-jin faced each other in a KBO regular-season game?
The available reporting doesn’t detail every scheduling factor across their careers, but it confirms that despite both being 27-year-old right-handers from the same draft class who have spent years as the KBO’s most talked-about aces, August 29, 2026 marked the first time they had ever started a regular-season game directly against one another. That the matchup happened to line up at all — after a rain postponement pushed it back a single day — is part of what made the moment feel significant to fans and reporters covering the league.
How fast did Kwak Bin and An Woo-jin actually throw?
Kwak Bin set a new career-high fastball velocity of 160.3 kilometers per hour, roughly 99.6 miles per hour, in the first inning. An Woo-jin matched him closely, touching 160.0 kilometers per hour, or about 99.4 miles per hour, later in the game. Both numbers sit at the very top end of velocity readings for any starting pitcher in professional baseball, in any league.
Who won the game, and what were the final pitching lines?
Kwak Bin earned the win with a quality start, throwing six innings and allowing two earned runs. An Woo-jin took the loss, pitching five innings and allowing five earned runs. Despite matching Kwak Bin nearly pitch for pitch in top-end velocity, An Woo-jin’s final line was the tougher of the two on this particular day.
Why did MLB scouts specifically attend this game?
Scouts from the Los Angeles Dodgers, New York Yankees, and San Diego Padres were reported to be in attendance in person specifically to watch Kwak Bin and An Woo-jin’s matchup. The confirmed reporting establishes their attendance at the game; it does not detail any specific transfer, posting, or contract plans connected to either pitcher. Their presence is best understood as a sign that both pitchers are firmly on the radar of MLB talent evaluators, given the caliber of velocity and performance both have shown.
A Duel Worth the Wait
There’s a certain poetry in the fact that this game almost didn’t happen on the day it did. Rain pushed it back twenty-four hours, a routine scheduling adjustment that could have just as easily separated Kwak Bin and An Woo-jin’s rotation turns entirely, delaying this first-ever meeting for weeks or months rather than a single day. Instead, the postponement barely made a dent in the moment — if anything, it gave one more day for anticipation to build around a matchup that had already been years in the making, between two pitchers who had grown up in the league together without ever squaring off as direct opponents.
What actually happened once the rain cleared and the two aces finally took the mound against each other more than lived up to the buildup. Two 27-year-old friends, drafted in the same class, both operating at the absolute peak of what a professional pitcher’s arm can do, traded triple-digit-adjacent fastballs in front of scouts from three of Major League Baseball’s most recognizable franchises. One pitcher walked away with a new career-high number attached to his name. The other walked away with a tougher final line but had already made his statement on the radar gun. And an entire league of fans, along with a handful of very attentive MLB evaluators, got to watch two of the best arms in Korean baseball prove — on the same day, in the same game, for the first time ever — exactly why they’re mentioned in the same breath.
Whatever comes next for either pitcher, whether that’s a deeper playoff run with their respective clubs, continued dominance atop the KBO’s pitching leaderboards, or eventually a path toward Major League Baseball, August 29, 2026 will likely stand as the day two of Korea’s best right-handed arms finally shared a mound as opponents — and made sure the moment was worth the wait.
Source: MoneyToday, Ilgan Sports, Sports Khan