On August 26, 2010 — Yoshinori Sato of the Yakult Swallows becomes the first Japanese pitcher to top the 100 mph barrier. One gaijin, Marc Kroon, had reached the figure in Nippon Pro Baseball.


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Sources:
Baseball Reference August 26
National Pastime August 26
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game