In 2008, 69 pitches thrown in Major League Baseball topped 100 mph. In 2016, that number was 1,419.
That’s an increase of more than 1,900 percent.
The graph below (you can click to enlarge) shows the steady increase of 100+ mph pitches in Major League Baseball over the past eight years. A peak in 2010 of 443 three-digit-mph pitches gave way to a total of 297 the next year, followed by a climb that shot up between 2014 and 2016.