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Born in Blue Springs, Missouri, United States, Jacob Walter Misiorowski made his Major League Baseball on June 12, 2025 as a Milwaukee Brewers pitcher. He turned 24 on April 3, 2026.

Milwaukee Brewers vs Philadelphia Phillies

The Milwaukee Brewers’ series opener against the Philadelphia Phillies at American Family Field in Milwaukee, Wisconsin, USA on June 12, 2026 was billed as a marquee matchup. But no one in attendance could have predicted they were about to witness one of the most dominant, record-shattering pitching performances in the MLB history.

Misiorowski took the mound and immediately electrified the crowd in the top of the first inning. Facing Phillies powerhouse leadoff hitter Kyle Schwarber, who was born in Middletown, Ohio, USA, the Blue Springs native unleashed a blistering 2-2 pitch that caught the lower outside corner of the strike zone.

Schwarber attempted a check swing but only managed a faint foul tip, which was cleanly snagged and held onto by Milwaukee catcher William Contreras for the strikeout. While an incredulous Schwarber began arguing the call with the home plate umpire, the rest of the stadium was transfixed by the stadium scorebug. It read a staggering 105 mph.

Shattering the Velocity Record

While the broadcast rounded the figure up, MLB’s official tracking data later verified the pitch at an exact 104.5 mph. The astonishing mark officially broke the record for the fastest pitch ever thrown by a starting pitcher in the Statcast era—besting the previous record of 103.7 mph, which, remarkably, Misiorowski himself had set on June 6, 2026.

For Schwarber, the historic pitch may not have even felt uniquely fast. Misiorowski subjected the slugger to a five-pitch sequence where every single offering traveled north of 103 mph, including a called strike on the third pitch that also eclipsed the 104 mph threshold.

In fact, the young righty did not just break his own velocity record once during the opening frame; he broke it four separate times. he proceeded to strike out the side, punching out Trea Turner on four pitches and Bryce Harper on three.

Of the 12 pitches Misiorowski threw in the first inning, his slowest fastball clocked in at a routine 102.3 mph.

Redefining Pitching Dominance

While Misiorowski never quite matched that 104.5 mph peak during the remainder of the contest, his sheer dominance never wavered. Over the course of the evening, he threw 58 pitches that registered at 100 mph or higher, averaging an astonishing 101.7 mph for the night. The Phillies’ hitters were completely neutralized, managing a comical 59% whiff rate by swinging and missing on 24 of the 41 fastballs they attempted to hit. By the end of the game, Misiorowski racked up more total swings-and-misses (26) than total balls thrown (21), never once falling into a three-ball count against a single batter.

What began as a velocity exhibition quickly transformed into a masterclass in efficiency. Prior to the recent game, the Brewers ace had never pitched beyond the seventh inning in his professional career. He shattered that personal ceiling by completing his first career shutout in a commanding 6-0 victory.