Misiorowski's Historic Rise
Jacob Misiorowski Transforms from Hardest Thrower to MLB's Best Starting Pitcher
Milwaukee Brewers right-hander Jacob Misiorowski is no longer just the hardest-throwing starter in baseball. He may be the best pitcher in the game, period. The 24-year-old leads the majors with a 1.34 ERA and 131 strikeouts through June 18, 2026, according to WBAL. He has thrown 460 pitches at 100-plus mph this season — an MLB record for a starting pitcher.
Since May 1, Misiorowski has posted a 1.17 ERA over eight starts. MLB.com researcher Sarah Langs found that is the best such stretch for any starter since earned runs became an official statistic in 1913. His rise has touched off a Cy Young Award race and a broader debate about whether baseball has ever seen anything quite like him.
A Historic June 12 Start Crystallized His Dominance
Exactly one year after his MLB debut, Misiorowski delivered what analysts called a masterpiece. He threw a 95-pitch complete game shutout against the Philadelphia Phillies on June 12, 2026. He allowed just one hit and struck out 15 batters. That outing earned a Game Score of 100 — a mark topped only six times in a nine-inning game in MLB history, per WRAL.
He also set a single-game record that night. Misiorowski threw 58 pitches at 100-plus mph, the most ever in one game. His fastest pitch hit 104.5 mph — the highest velocity ever recorded by a starting pitcher in the pitch-tracking era, which began in 2008. For context, most elite closers never reach that speed.
From Wild Prospect to Surgical Ace in One Season
Misiorowski was a second-round pick out of Crowder College in 2022. He wowed scouts at the 2023 MLB Futures Game by touching 102.4 mph, per Beyond the Monster. But his walk rate was a problem — he issued 5.4 walks per nine innings in the minors. Command was the missing piece.
Pitching coach Chris Hook helped fix that. He built what he calls a "three-headed fastball" and added a 97-mph slider. The results are striking. Misiorowski's walk rate has dropped to roughly 1.42 per nine innings during his recent hot streak. He now throws about 14.6 pitches per inning, down from 17.6 as a prospect. FanGraphs analysts say his Stuff+ metrics are the highest ever recorded for a starter.
Manager Calls Him Forrest Gump — He Leaned Into It
Brewers manager Pat Murphy sparked a viral moment when he compared Misiorowski to Forrest Gump. Murphy said his pitcher has a "naiveté" and refuses to "put limits on himself," according to WRAL. Misiorowski responded by posting a meme of his own face on the movie character's body. Fans on Reddit quickly dubbed the run "Miz Mania."
The nickname fits his personality. Analysts describe him as a "Gen Z showman" with an unapologetic strut on the mound. He made the NL All-Star team in July 2025 after just five career starts — one of the quickest call-ups to the Midsummer Classic in history, per Beyond the Monster. Now, in his first full season, he is the betting favorite for the NL Cy Young Award.
Durability Questions Loom Over a Generational Talent
Not everyone is celebrating without worry. Some medical analysts warn that throwing 104.5 mph is a "ticking time bomb" for the ulnar collateral ligament, the key ligament in the elbow. The Brewers threw Misiorowski 141 innings in 2025. Conventional wisdom sets a soft limit of 170 innings for a young arm, per Stadium Rant.
Hook and the Brewers push back on that concern. They argue that fewer pitches per inning means less stress on the arm, not more. His 95-pitch complete game is their proof. Meanwhile, his only real Cy Young competition is Phillies left-hander Cristopher Sánchez, who held a 1.82 ERA and 116 strikeouts entering mid-June, per MLB.com. Sánchez has thrown 99 innings to Misiorowski's 87, giving some voters pause about the workload gap.
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