Brewers' 103 mph-throwing prospect Jacob Misiorowski forced to leave no-hit MLB debut

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Jacob Misiorowski was living out every young boy's dream on Thursday night by making his MLB debut.

The 103 mph-throwing right-hander got the call to start for the Milwaukee Brewers, and he could not have gotten off to a better start.

He held the St. Louis Cardinals hitless through his first five innings of work, striking out five and walking four.

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Milwaukee Brewers pitcher Jacob Misiorowski, #33, throws against St. Louis Cardinals outfielder Lars Nootbaar as he makes his major league debut during the first inning of a baseball game on Thursday, June 12, 2025 in Milwaukee. (AP Photo/Kayla Wolf)

However, he was forced to exit the game.

Misiorowski, 23, had just thrown a third straight ball to Victor Scott to open the sixth when his foot landed awkwardly on the front of the mound. After the Brewers medical staff went out to check on him, Misiorowski exited the game, and Nick Mears came out of the bullpen.

The Brewers later said Misiorowski left due to cramping in his right calf and quadriceps.

"Of course, I don’t want to leave like that," Misiorowski said. "I feel like I could have kept going, but I cramped up. Stuff happens."

Misiorowski said he had no idea he had even had a no-hitter up to that point.

"I thought one of the popups landed," he said.

Milwaukee Brewers pitcher Jacob Misiorowski, #33, walks off the field with head athletic trainer Brad Epstein during the sixth inning of a baseball game against the St. Louis Cardinals on Thursday, June 12, 2025 in Milwaukee. (AP Photo/Kayla Wolf)

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