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FastestThings

Baseball

Jacob Misiorowski

Fastest pitch by a starting pitcher in the tracking era: 105.5 mph on 27 June 2026, to Pete Crow-Armstrong.

Also known as The Miz, Misiorowski 105.5
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Ball speed

Published as 105.5 mphPublished as 105.5 mphPublished as 105.5 mph

Statcast release speed, Jacob Misiorowski of the Milwaukee Brewers to Pete Crow-Armstrong of the Chicago Cubs. The hall of fame dates the pitch 27 June 2026 and calls it the fastest by a starter. The game story calls that night Friday. The speed is 105.5 mph on every account.

OfficialMLB.com (opens source in a new tab)

In context

  • 1.6× a cheetah's timed top speedSourced · Cheetah, 29 m/s. Sharp 1997, mean of three timed runs over 201.2 m
  • A football field in 1.9 sConstant · American football field, 100 yd (91.44 m)
  • London to New York in 32 h 48 minConstant · London to New York, 5,570 km great-circle

Worked out from the sourced figure above, which stays the ranked number.

Mechanism

Why it's so fast

Jacob Misiorowski's fastball is arm speed delivered through a long lever at release. The ranked figure is the pitch speed the measurement system printed, not an exit velocity off a bat.

  1. The whip

    Legs, hips, shoulder and elbow line up so the ball leaves at the end of the motion. A longer path helps only if the timing still snaps.

  2. Pitch speed, only

    Exit velocity is a different list. This row stays on the pitch the sources timed.

Nearby on this list: Ben Joyce.

Provenance

Every measurement

Claimed, measured and official figures side by side, each with its source. The ranked figure is marked.

  1. 170km/h105.5mph47.2m/s91.7knRanked figure

    Statcast release speed, Jacob Misiorowski of the Milwaukee Brewers to Pete Crow-Armstrong of the Chicago Cubs. The hall of fame dates the pitch 27 June 2026 and calls it the fastest by a starter. The game story calls that night Friday. The speed is 105.5 mph on every account.

    The game story, dated 27 June 2026, says Friday night and prints 105.5 mph. The AP wire prints 105.5 mph on the third pitch and calls the game Friday night without a second calendar day. The stored day is the hall of fame's 27 June.

    Official
    MLB.com (opens source in a new tab)

Reference

Specs

Pitcher
Jacob Misiorowski
Batter
Pete Crow-Armstrong
Speed
105.5 mph
Date
27 June 2026

Context

Background

MLB.com's Statcast speed hall of fame prints the fastest pitch by a starter as 105.5 mph by Jacob Misiorowski on 27 June 2026, and says the pitch to Pete Crow-Armstrong was a 105.5 mph heater. MLB's game story prints the same 105.5 mph and says it tied Ben Joyce's 3 September 2024 pitch. The story is dated 27 June 2026 and calls the game Friday night.

The Associated Press wire on FOX Sports prints 105.5 mph on the third pitch of the game, fouled off by Pete Crow-Armstrong, and also calls the night Friday. The ranked figure is 105.5 mph, the number all three pages print. The stored day is the hall of fame's 27 June. The Friday wording is the note, not a second speed. Joyce's 105.5 mph is a different pitch and stays its own row.

Spot a wrong number?

Every report is read by a person, and corrections are dated on the page.