The Brewers ace hit 103.5 mph on his very first offering of Game 1, breaking a mark that had stood since 2016.
Jacob Misiorowski wasted no time making an impression in his first World Series start. The Brewers right-hander's opening pitch of Game 1 of the 2026 Fall Classic registered 103.5 mph, setting a new record for the fastest pitch thrown in World Series history.
The previous mark had stood since 2016, and Misiorowski needed exactly one pitch to erase it. It was his first World Series appearance, and he used it to immediately put his velocity on display for a national audience.
The record throw instantly became the headline moment of the night before the game had even settled into a rhythm. For a pitcher known for his high-octane fastball, the moment was less a surprise than a formal introduction on the sport's biggest stage.
No further details on the rest of his outing were included, but the record itself ensures Misiorowski's name is now attached to a piece of World Series history regardless of how Game 1 ultimately played out.