Jacob Misiorowski Sets Starter Fastball Record with 103.7 mph Pitch

On Saturday night at Coors Field in Denver, Milwaukee Brewers Jacob Misiorowski threw a 103.7 mph fastball to Colorado Rockies batter Kyle Karros in the third inning. The pitch became the fastest recorded by a starter since MLB began tracking pitch speeds in 2008. Misiorowski finished with eight strikeouts over seven innings, allowing one unearned run in a 7-1 Brewers victory.

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MLB began measuring pitch velocity in 2008, establishing a statistical baseline for fastball speed. Before Misiorowski’s 103.7 mph delivery, the highest recorded starter fastball was his own 103.4 mph pitch against the St. Louis Cardinals on May 25. The overall MLB record for any pitcher remains Aroldis Chapman’s 105.8 mph throw for the Cincinnati Reds in 2010.

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Jacob Misiorowski, a 24-year-old right-hander, entered the 2024 season as the Milwaukee Brewers’ ace. By the end of the Coors Field start he had logged the 12 fastest starter pitches of the season and raised his career strikeout total to 203 in 28 appearances, tying Paul Skenes and Noah Syndergaard as the seventh-fastest player in MLB history to reach 200 strikeouts.

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• 52 pitches at 100 mph or higher on Saturday, including a record 45 at 101 mph or above.

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• On May 25 he threw 57 pitches at 100 mph+, with 40 at 101 mph+.

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• Season ERA lowered to 1.50 after the Rockies game.

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• Total strikeouts for the season: eight in the seven-inning outing.

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Brewers manager Pat Murphy praised Misiorowski’s physical tools, noting his extension and velocity, but stressed that success also depends on command and precise location, warning that good hitters can time any pitch.

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• “It's one of those things: It is what it is,” — Jacob Misiorowski, Milwaukee Brewers pitcher

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• “I'm going to keep going, trying to get strikeouts, and if that's what it takes to get strikeouts, then so be it.” — Jacob Misiorowski, Milwaukee Brewers pitcher

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• “Miz has got great extension and great velocity, so that doesn't surprise me,” — Pat Murphy, Milwaukee Brewers manager

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• “But we've got to get off that -- the harder the better, and all that. He's got to throw the ball in the zone and throw his other pitches in the zone. As I say often, good hitters can time up anything.” — Pat Murphy, Milwaukee Brewers manager

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Misiorowski’s velocity gives Milwaukee a high-velocity ace capable of generating strikeouts, a valuable asset for the Brewers. Murphy’s caution about pitch location suggests that sustained success will require balancing speed with precise command. The record reinforces a broader trend of starters reaching triple-digit speeds, potentially influencing scouting and development priorities across MLB.

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The reports contain no dissenting analysis or criticism of Misiorowski’s approach, and no alternative data contradict the recorded pitch speed. Consequently, the narrative lacks external evaluation of long-term durability risks associated with consistently throwing at or above 100 mph.

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