Milwaukee Brewers starting pitcher Jacob Misiorowski made history Friday night when he unleashed a 105.5 mph fastball — the fastest pitch ever thrown by a starting pitcher on record — against Chicago Cubs leadoff hitter Pete Crow-Armstrong in the opening inning.
The blazing heater surpassed Misiorowski’s own previous best of 104.5 mph. It came on an 0-2 count and tracked toward the inside portion of the plate. Crow-Armstrong fouled it off before ultimately striking out to end the at-bat.
Earlier in that same at-bat, Misiorowski’s first pitch registered 103 mph on the stadium radar gun, and his second clocked in at 104 mph.
The right-hander went on to deliver a quality start before leaving the game in the sixth inning. He finished with eight strikeouts, four walks, and allowed just one run — a solo home run by Seiya Suzuki in the fifth inning. His 107th and final pitch of the night was still a scorching 102.8 mph fastball.
Since Statcast began tracking pitch velocity in 2008, only left-handed reliever Aroldis Chapman has thrown a faster pitch. Chapman touched 105.8 mph in 2010 and 105.7 mph in 2016. Ben Joyce also matched Misiorowski’s 105.5 mph mark on September 3, 2024.
Misiorowski currently leads all of Major League Baseball with a 1.45 ERA and 146 strikeouts on the season.
