Boston Red Sox

Watch: A radar gun clocked Joe Kelly’s pitch to Aaron Judge at 104 mph

Red Sox pitcher Joe Kelly's average pitch velocity this far in the season is 98.9 mph, according to MLB Statcast. Jessica Rinaldi/Globe Staff

Joe Kelly, who holds fastest pitch of the season this year, proved on Tuesday night that his 102.2 mph fastball in April was no fluke.

Pitching to Aaron Judge of the New York Yankees, Kelly threw a high two-seam fastball that registered at 104 mph on the radar gun.

The right-hander ultimately struck out Judge in a six-pitch at-bat, featuring four balls with a pitch velocity of over 100 mph.

While Red Sox nation took to Twitter to express how impressed they were with Kelly’s fiery speed of 104 mph, MLB Statcast recorded the pitch as 102.2 mph — matching the velocity of Kelly’s throw from earlier in the year.