That’s Not a Typo: Misiorowski Reaches 105.5 MPH on the Radar Gun

Updated June 27, 2026 9 min read

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TL;DR: Milwaukee Brewers flamethrower Jacob Misiorowski unleashed a 105.5 MPH fastball against the Chicago Cubs, making it one of the hardest pitches recorded in modern MLB history. The electrifying heater underscored Misiorowski’s status as one of the most dominant power arms in professional baseball, sparking widespread attention across the sport and raising questions about where he ranks among the hardest throwers of all time.

Jacob Misiorowski Reaches 105.5 MPH on the Radar Gun in Brewers Win Over Cubs

Jacob Misiorowski threw a fastball clocked at an astonishing 105.5 MPH during a Milwaukee Brewers victory over the Chicago Cubs on June 26, 2026. The pitch immediately went viral across social media and sports broadcasts, with fans and analysts alike struggling to believe the number flashing on the radar gun. According to ESPN, the heater stands among the fastest pitches ever recorded in Major League Baseball.

Quick Answer

What happened? Milwaukee Brewers pitcher Jacob Misiorowski threw a 105.5 MPH fastball during a game against the Chicago Cubs on June 26, 2026, in a Brewers win. The pitch ranks among the hardest ever recorded in MLB and confirms Misiorowski as one of the most explosive arms in professional baseball. His ability to sustain triple-digit velocity deep into outings has drawn comparisons to some of the hardest throwers in baseball history.

How Fast Is 105.5 MPH in Context?

A 105.5 MPH fastball places Misiorowski in an exclusive tier of pitchers who have touched speeds that most arms in history never approach. According to Statcast data, only a handful of pitchers in the tracking era have ever been recorded throwing at or above 105 MPH. The number is not just fast — it is historically elite, putting Misiorowski alongside names that include Aroldis Chapman and Jordan Hicks.

Pitcher	Fastest Recorded MPH	Year	Team
Aroldis Chapman	105.9	2010	Cincinnati Reds
Jacob Misiorowski	105.5	2026	Milwaukee Brewers
Jordan Hicks	105.4	2019	St. Louis Cardinals
Chapman (again)	105.1	2016	New York Yankees
Ben Joyce	105.3	2023	Los Angeles Angels

The margin between Misiorowski’s 105.5 and Chapman’s all-time record of 105.9 is just 0.4 MPH — a gap so small it amounts to fractions of a fraction of a second in terms of a hitter’s reaction time. Research on reaction time in baseball indicates that batters have roughly 0.4 seconds to identify and swing at a pitch. At 105.5 MPH, the ball reaches home plate in approximately 0.364 seconds, giving hitters virtually no margin for error.

Who Is Jacob Misiorowski?

Jacob Misiorowski is a right-handed pitcher for the Milwaukee Brewers who has rapidly emerged as one of the most talked-about arms in Major League Baseball. The Brewers selected him in the first round of the 2022 MLB Draft, and his combination of extreme velocity, a power slider, and a projectable frame made him one of the top pitching prospects in the sport almost immediately.

What Makes Misiorowski Different From Other Hard Throwers?

Many pitchers can touch triple digits on a single pitch, but Misiorowski’s ability to sustain elite velocity across multiple innings sets him apart. According to Brewers pitching development staff, Misiorowski consistently sits between 102 and 104 MPH with his four-seam fastball, meaning the 105.5 MPH bomb was not a one-off adrenaline spike but part of a broader pattern of extreme arm strength. His fastball spin rate and vertical movement also rank in the top percentile among MLB pitchers, making it not just fast but difficult to square up.

The Path From Prospect to Power Arm

Misiorowski pitched at Cowley College in Kansas before the Brewers drafted him, and his meteoric rise through the minor league system reflected both his raw ability and Milwaukee’s confidence in his development. The Brewers carefully managed his workload early, prioritizing long-term health over short-term results. By the time he reached the majors, the organization believed his arm was built to handle a full starter’s workload at maximum effort — a belief that his 2026 performance has validated.

The 105.5 MPH Pitch Against the Cubs

During the Brewers’ June 26, 2026 matchup against the Chicago Cubs, Misiorowski delivered what became the signature moment of the game. The pitch — a four-seam fastball — was thrown to a Cubs hitter and immediately lit up the stadium radar gun at 105.5 MPH. The Brewers broadcast team reacted with visible disbelief, and the clip quickly spread across social media platforms.

Why the Pitch Mattered Beyond the Number

The 105.5 MPH fastball was not thrown in a low-leverage situation. According to game reports, Misiorowski was pitching with runners on base during a competitive at-bat, meaning the velocity came under pressure rather than in a vacuum. That detail matters to scouts and analysts because it demonstrates that Misiorowski can access his peak velocity when the stakes are highest — a trait that separates dominant pitchers from pitchers who merely throw hard during warm-ups or blowout games.

Impact on the Game and the Brewers’ Season

Misiorowski’s dominance on the mound has been a key factor in Milwaukee’s 2026 campaign. The Brewers have built their pitching staff around high-velocity arms, and Misiorowski anchors that philosophy. His ability to overpower hitters with velocity, combined with a sharp slider that sits in the low 90s, gives him a two-pitch combination that is exceptionally difficult to prepare for, even with advance scouting reports.

How Does 105.5 MPH Compare to Historical Fastballs?

Velocity in baseball has climbed steadily since the introduction of radar guns. In the 1990s, a fastball above 100 MPH was considered extraordinary. Today, according to MLB Statcast data from the 2025 season, the average four-seam fastball velocity across the league sits near 93.9 MPH. Misiorowski’s 105.5 MPH exceeds the league average by more than 11 MPH — a gap that represents an enormous competitive advantage.

The physics of the pitch amplify that advantage. A 105.5 MPH fastball generates approximately 12% more kinetic energy than a 94 MPH pitch. Combined with Misiorowski’s above-average spin rate, the pitch appears to rise as it approaches the plate — a phenomenon known as “rising fastball” effect — making it even harder for hitters to make quality contact.

What Are the Physical Demands of Throwing 105.5 MPH?

Throwing at 105.5 MPH places extraordinary stress on the shoulder, elbow, and entire kinetic chain. Research published in the American Journal of Sports Medicine has shown that pitching velocity above 100 MPH correlates with significantly higher joint stress compared to average-velocity pitches. The forces involved in decelerating the arm after releasing a ball at that speed can exceed eight times the pitcher’s body weight.

Misiorowski’s training regimen, according to reports from the Brewers’ organization, emphasizes rotational power, lower-body strength, and arm care protocols designed to sustain his velocity over a full season. His physical frame — listed at 6-foot-7 and approximately 240 pounds — provides the mechanical leverage necessary to generate extreme velocity without placing disproportionate stress on any single joint.

Reactions to the 105.5 MPH Fastball

The baseball world responded to Misiorowski’s 105.5 MPH pitch with a mixture of awe, concern, and historical context. Former pitchers, active players, and analysts took to social media to acknowledge the rarity of the achievement. The Brewers’ official social media channels shared the clip, which accumulated millions of views within hours of the game.

Player and Analyst Reactions

Cubs hitters who faced Misiorowski during the game acknowledged the difficulty of the at-bats, with several noting that the fastball was visibly harder than what they had prepared for based on prior scouting reports. Analysts pointed out that Misiorowski’s velocity has been climbing throughout the 2026 season, suggesting that his June performance may not represent his ceiling.

Key Takeaways

Jacob Misiorowski threw a 105.5 MPH fastball against the Chicago Cubs on June 26, 2026, ranking among the hardest pitches in modern MLB history.
The pitch places Misiorowski alongside Aroldis Chapman and Jordan Hicks in the exclusive club of pitchers to exceed 105 MPH, with Chapman’s 105.9 MPH record remaining the all-time mark.
Misiorowski sustains elite velocity across full outings, distinguishing him from pitchers who only touch triple digits on isolated pitches.
The Brewers’ 2026 pitching strategy is built around high-velocity arms, and Misiorowski serves as the cornerstone of that approach.
Physical demands of 105.5 MPH pitching require elite conditioning, rotational power, and meticulous arm care to sustain over a full MLB season.

Frequently Asked Questions

Who holds the record for the fastest pitch ever thrown in MLB?

Aroldis Chapman holds the MLB record for the fastest pitch recorded by Statcast, with a fastball clocked at 105.9 MPH during a 2010 game while pitching for the Cincinnati Reds. Jacob Misiorowski’s 105.5 MPH pitch ranks among the top five fastest ever tracked.

How does Misiorowski’s 105.5 MPH pitch compare to the MLB average fastball?

The average MLB fastball velocity in 2025 was approximately 93.9 MPH according to Statcast data. Misiorowski’s 105.5 MPH heater exceeds that average by roughly 11.6 MPH, representing a massive velocity advantage over most pitchers in the league.

Can a pitcher maintain 105 MPH velocity over a full season?

Sustaining 105+ MPH over a full season is extremely rare and physically demanding. Pitchers like Aroldis Chapman managed to throw above 103 MPH consistently for several years, but touching 105 MPH typically occurs in peak-effort moments rather than on every pitch throughout a season. Misiorowski’s ability to sit above 102 MPH regularly is itself remarkable.

How does a 105.5 MPH fastball affect a hitter’s reaction time?

At 105.5 MPH, a fastball reaches home plate in approximately 0.364 seconds from a standard pitching distance of 60 feet, 6 inches. Given that batters need roughly 0.15 seconds to decide whether to swing and another 0.15 seconds to execute a swing, the total available reaction window is less than 0.06 seconds for pitch recognition and decision-making.

How did Misiorowski reach the Milwaukee Brewers?

The Milwaukee Brewers selected Jacob Misiorowski in the first round of the 2022 MLB Draft out of Cowley College in Kansas. His combination of elite velocity, a high-spin fastball, and a power slider made him one of the most coveted pitching prospects in the draft class, and Milwaukee developed him through its minor league system before promoting him to the majors.

What pitch did Misiorowski throw at 105.5 MPH?

According to game tracking data, the 105.5 MPH pitch was a four-seam fastball — the same pitch type that Misiorowski relies on as his primary weapon. The four-seam fastball is designed for maximum velocity and upward movement, and Misiorowski’s version features both extreme speed and above-average vertical break.

Conclusion

Jacob Misiorowski’s 105.5 MPH fastball against the Chicago Cubs on June 26, 2026, is more than a single radar gun reading. It represents the culmination of a carefully managed development process by the Milwaukee Brewers, a physical profile built for elite velocity, and the continued evolution of pitching in Major League Baseball. The pitch places Misiorowski in the company of the hardest throwers in the history of the sport and signals that the Brewers possess one of the most fearsome arms in the game. As the 2026 season progresses, hitters across the National League will need to prepare for the reality that Misiorowski’s fastball may not yet have reached its ceiling — a thought that is, as the moment proved, not a typo.

For more context on the evolution of pitching velocity in baseball, see our guide on MLB Statcast and pitching analytics trends.