Jacob Misiorowski already had a reputation for throwing gas. But on Friday night, the Milwaukee Brewers right-hander took that reputation into the record books—and left a piece of history in the dirt.
Facing Philadelphia Phillies slugger Kyle Schwarber in the first inning, Misiorowski unleashed a fastball that registered 104.5 mph on the stadium radar gun. According to the Brewers organization, that single pitch is now the fastest ever thrown by a starting pitcher in Major League Baseball history.
Yes, ever.
What Makes the Record So Remarkable
Relievers have pushed into triple digits for years. Starters are another story. Pitching deep into games demands conservation of energy, which is why most starters live in the 92–96 mph range. Misiorowski, a 6-foot-7 former junior college standout, has always been an exception. His arm slot, extension, and raw power have drawn comparisons to some of the game’s hardest throwers, but this moment puts him in a category of his own among MLB starters.
The Brewers posted the clip on social media shortly after the pitch, and the baseball world responded with appropriate disbelief. One fan on X wrote, “That’s not a fastball. That’s a physics violation.” Another noted that Schwarber, a two-time All-Star and known for his own power, had no chance to catch up to it.
More Than Just Speed
Misiorowski’s record-breaking heater is not just a novelty—it signals that the Brewers may have one of the most electric young arms in the game. The 23-year-old has been working to refine his command and secondary pitches, but when he needs to blow one by a hitter, he now holds the ultimate credential.
It would not be surprising to see Misiorowski break his own mark in the weeks or months ahead. At 6-foot-7 with room to add strength and with an aggressive approach on the mound, the ceiling here is frighteningly high.
The team has not commented on whether there are any plans to reduce his workload or monitor his velocity long-term, but for now, the Brewers and their fans are happy to let him air it out.
More to come on this story as details develop.
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