Jacob Misiorowski was a rookie curiosity a year ago, a guy who threw 100 mph and made five appearances just to squeak onto the 2025 All-Star roster. This year he's not a novelty anymore. He's leading all of baseball in ERA and strikeouts heading into the break, and the numbers are so lopsided that the closest historical comp is more than half a century old.
Jacob Misiorowki struck out 167 batters and posted a 1.62 ERA in the first half. The last time an MLB pitcher struck out more batters and had a lower ERA in the first half of a season was Vida Blue 55 years ago.
That's 167 strikeouts and a 1.62 ERA across 111 innings for the Brewers right-hander, numbers that led the majors outright going into the All-Star Game. Vida Blue's 1971 season is the last time a pitcher paired that kind of swing-and-miss volume with an ERA that low over a first half, and Blue's year ended with an AL MVP award and a Cy Young. That's the company Misiorowski is keeping right now, at 24 years old, in year two.
The stuff has always been loud with Misiorowski. The fastball sits triple digits and the breaking stuff has looked unfair on TV all summer. What's changed is the command, and pitching analysts have been zeroing in on the mechanical tweaks behind it.
The mechanical changes that turned Miz into a monster. 🔥
That's the difference between a guy who lights up radar guns and a guy who leads the league in ERA — cleaner mechanics repeating enough to keep the ball down and the walks manageable, all while the velocity stayed exactly as terrifying as it was as a prospect.
There's a wrinkle here, too. Misiorowski was scratched from his final start before the break with general fatigue, and he's not expected to slot right back into Milwaukee's rotation the moment the second half starts. For a guy chasing a Vida Blue-level season, any missed time matters — strikeout and ERA paces get harder to hold onto with fewer innings to pad them. It's also worth watching given the Brewers reportedly haven't opened extension talks with him, so every start between now and free agency eligibility carries extra weight for his long-term value.
None of that changes what's already on the stat sheet. Misiorowski built a first half that stands next to a Hall of Fame-caliber season from half a century ago, and he did it as a guy who was barely a rookie last summer. However the workload gets managed down the stretch, the league now has to treat him as the best arm in baseball, not a fun story anymore.