Full Breakdown
Jacob Misiorowski Sets Record for Fastest Starter Fastball
6/8/2026, 1:41:16 PM
Record-Setting Fastball at Coors Field
On June 7, 2026, Milwaukee Brewers pitcher Jacob Misiorowski threw a 103.7 mph (166.9 kph) fastball to Rockies third baseman Kyle Karros in the third inning at Coors Field. The pitch set the record for the fastest starter fastball since pitch tracking began in 2008. Milwaukee won 7–1.
Context and Key Figures
MLB pitch-tracking began in 2008; Aroldis Chapman holds the overall record at 105.8 mph (2010). Misiorowski entered 2026 after a 103.4 mph outing on May 25 and an All-Star selection in 2025. Brewers manager Pat Murphy and catcher William Contreras commented on the performance.
Performance Metrics
Misiorowski threw 45 pitches at 101 mph+ and 52 at 100 mph+, both season highs for a starter. He recorded eight strikeouts, one unearned run on four hits and three walks in seven innings, cutting his ERA to 1.50 and WHIP to 0.789. The win raised his career strikeouts to 203, tying him for seventh-fastest to 200 in MLB history.
Significance and Impact
The 103.7 mph fastball sets a new benchmark for starters, highlighting the Brewers’ emerging power arm. While the pitch did not produce an out, the record underscores Misiorowski’s role in Milwaukee’s low ERA and high strikeout rate.
Official Statements & Responses
Pat Murphy said the velocity reflected Misiorowski’s extension but stressed the need for command. William Contreras praised the performance, saying, “Thanks to God he’s on our side.” Misiorowski called the effort “it is what it is” and vowed to keep chasing strikeouts. MLB’s X account referenced the WWE rivalry between Danhausen and The Miz.
Criticism & Opposition
The record pitch was low and outside, failing to retire Karros, showing raw speed alone does not guarantee effectiveness. Critics note Misiorowski’s reliance on velocity and occasional command lapses, highlighted by a comebacker that struck his calf and a 98 mph cutter that hit Tyler Freeman’s helmet.
On-the-Ground Game Summary
Milwaukee’s offense supplied five homers—two from Brice Turang, and one each from David Hamilton, William Contreras and Jake Bauers—supporting Misiorowski’s seven-inning effort. The Rockies’ lone run was unearned, scoring after a defensive lapse in the fifth.
Conflicting Reports & Gaps
Sources vary on speed, with some listing 103.7 mph (166.9 kph) and others 103.6 mph. Reliability scores range from 39.2 to 45.2, and a few outlets give none. Most agree on 45 pitches at 101 mph+, but the May 25 count of 101-plus mph pitches is reported as either 40 or 57. No source addresses long-term durability of sustained triple-digit velocity.
Verbatim Quotes
“Miz has got great extension and great velocity, so that doesn't surprise me,” — Pat Murphy, Brewers manager
“But we've got to get off that — the harder the better, and all that.” — Pat Murphy, Brewers manager
“It's one of those things: It is what it is,” — Jacob Misiorowski, Brewers pitcher
“Thanks to God he's on our side,” — William Contreras, Brewers catcher
What's Next
Next start: Shane Drohan vs. Rockies Sunday; Colorado counters with Kyle Freeland.
