Jacob Misiorowski barely needed a warmup before stamping his name into World Series history.
On the first pitch of Milwaukee’s first World Series game since 1982, the Brewers right-hander fired a 103.5 mph fastball, according to Codify, setting the record for the fastest pitch ever thrown by a starting pitcher in a World Series game. The previous mark belonged to a 101.1 mph pitch.
That kind of velocity has been Misiorowski’s calling card all season. Back in June, he already had set the record for the fastest pitch thrown by a starter in recorded Major League Baseball history, reaching 105.5 mph.
Heading into the World Series, the benchmark for a starter was 101 mph. He blew past it immediately.
Misiorowski’s rise has been built on more than just one outrageous fastball. The 24-year-old made only 15 major league appearances in 2025 and finished with a 4.36 ERA, though he still burst onto the scene quickly enough to earn an All-Star nod. He faded late that season, but 2026 has been a different story entirely.
He is now widely expected to win the National League Cy Young Award after going 30 starts with a 1.80 ERA and a league-leading 252 strikeouts. That workload helped produce the single best season by a starting pitcher in Brewers history, and it also locked in his postseason role.
A year ago, his place in the rotation was unsettled entering October. This year, he started Game 1 of the NLDS, Game 1 of the NLCS and now Game 1 of the World Series.
And the fastball wasn’t all he brought Friday night. Misiorowski worked a scoreless first inning, calm as ever in a tense setting at American Family Field.
The emotions around the moment were obvious, but he didn’t play into them. He simply took the mound and handled it like it was just another start.
The World Series is only one pitch old, but Misiorowski has already made it part of his story.
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