What Jacob Misiorowski Did on Saturday Has Never Happened Before, and Might Never Happen Again

[Matthew Trueblood]

Image courtesy of © Jeff Hanisch-Imagn Images

The pitch-tracking era dates back to the installation of PITCHf/x cameras in every big-league stadium in 2008. It covers less than 20 years of baseball's long history, then, but given all we've learned about sports medicine and performance and all the changes in the game we've seen over that relatively brief span, you can pretty safely say that a velocity record for the pitch-tracking era is a velocity record for all of baseball history. No, Nolan Ryan didn't throw harder than Jacob deGrom. No, Bob Feller's fastball wasn't measured incorrectly. Everyone throws harder now than they did before.

When I tell you, then, that Jacob Misiorowski's 21 pitches with a perceived velocity of 102 miles per hour or higher that resulted in non-contact strikes on Saturday is a record, there's no reasonable argument against it. Sure, we can't measure the speed of Ryan's or Kerry Wood's or even Robb Nen's best heaters precisely, but we can be sure they didn't throw as hard as Misiorowski does—and, in the case of Nen and similarly hard-throwing relievers, the sheer volume of Misiorowski's dominance this weekend is out of reach.

If I stopped at telling you that that number is a record, though, I'd be underselling what Misiorowski really did to the Pirates. He threw 21 pitches with that perceived speed that went for either called strikes or whiffs; we're not even including foul balls here. The second-highest number of such pitches by any pitcher in a game for which we have the requisite data was by Jordan Hicks, three years ago, almost to the day. Hicks was working in long relief on Apr. 26, 2023, against the Rockies. He got three more called and swinging strikes at 102+ than anyone else had ever had, to that point—with nine. He had nine (9). Later that year, Ben Joyce of the Angels twice got as high as seven (7) such offerings. In 2025, Misiorowski had seven (7) in one start just after the All-Star break, against the Mariners, and he became the first person other than Hicks to get to eight (8) in September, also against the Pirates.

Saturday was a whole other thing. Saturday was a massive achievement in power and endurance. Misiorowski blew Oneil Cruz away with a pitch at 102.7 MPH (which, given his near-elite extension, means the perceived speed was north of 104) in the first inning.

But we've seen him do that before. Often, especially early this year, Misiorowski would flash extraordinary velocity at the front end of starts, but see that speed tick down after the first inning and never tick back up. On Saturday, it was a very different story. Of the 21 pitches we're talking about, he had:

• 9 in the 1st inning (tying the previous record in one frame)
• 3 in the 2nd
• 2 in the 3rd
• 1 in the 5th
• 6 in the 6th

He departed the mound by completing his ninth strikeout of the day with a 101.4-MPH (perceived speed: roughly 103.5) heater past Konnor Griffin, his second similarly ferocious pitch of the at-bat. 

He'd already beaten Jake Mangum, earlier in the inning, with three straight high heaters, each faster than the last.

You never, ever see this much velocity from a pitcher pacing themselves for a full-fledged start—except from Misiorowski. There have been 13 appearances in which a pitcher threw at least 50 pitches and had at least five of these non-contact strikes at 102+. deGrom had one, in 2021—cheating a little bit, because he just barely got to five such pitches and one of them came against opposing pitcher Merrill Kelly. The other 12 belong to Misiorowski. Ten of those 12 came last season, and he just barely got to five in his start against the Red Sox early in April. This was a transcendent moment. It was a pitcher already ahead of the pack by a great distance, pushing himself to a new level.

Admittedly, part of this story is the Pirates. They're an extremely whiff-prone offense, especially when you take one of their best contact hitters (Mangum) and turn him into a whiff machine. That's part of the point, though. Misiorowski's sheer power was so great that Mangum, who has a delightful knack for opposite-field contact but one of the slowest swings in baseball, turned from a great contact hitter to a hopeless case. Seven of the nine hitters in the Pirates' order suffered at least one of these moments of total overwhelm. 

There are still rough edges Misiorowski needs to sand off, as he pursues the National League Cy Young Award. He can put his team in better positions to win games by being more consistent within a start. It's notable that the one truly bad inning he had on Saturday (the two-run top of the 4th) was the one wherein he failed to overpower any Pittsburgh batter the way he did in every other inning of the start. The Brewers need to continue working with him to find the best way to utilize his arsenal, especially to survive those innings when some weak contact produces hits or when his command wobbles. The stuff he showed Saturday, though, puts things neatly into perspective. Who is Misiorowski's comp? By whose yardstick can he measured? No one, and no one's. He's broken the scale. He's breaking the game. He just has to ensure that he can get all the way from the first pitch of outings to the last, without breaking in his own right.

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[sveumrules]

8 minutes ago, Matthew Trueblood said:

Who is Misiorowski's comp?

2025 Misio (66 IP)
145 K+ | 136 BB+

2026 Misio (32 IP)
170 K+ | 102 BB+

25-26 Misio (98 IP)
153 K+ | 125 BB+

Obviously will depend on where things settle in (crazy to think there is remaining upside to tap into even with the improvements he's already made over last year) but looking at some guys from 2021 to present the possible range could be something like...

Blake Snell (602 IP)
141 K+ | 136 BB+

Dylan Cease (909 IP)
133 K+ | 117 BB+

Hunter Greene (495 IP)
134 K+ | 104 BB+

Tyler Glasnow (472 IP)
144 K+ | 97 BB+

Garrett Crochet (448 IP)
139 K+ | 83 BB+

Paul Skenes (349 IP)
138 K+ | 72 BB+

Tarik Skubal (771 IP)
128 K+ | 65 BB+

Jacob deGrom (395 IP)
155 K+ | 53 BB+