Jeff Zimmerman of RotoGraphs and other outlets turned me on to a new baseball rule recently: The Yu Darvish Rule. As seen in the tweet below, unless your name is Yu Darvish, you should not be throwing more than four pitches.
Yu Darvish Rule Violation
Aaron Civale with seven pitches thrown at least 5% of the time.
Five of them have not generated a single swing-and-miss. pic.twitter.com/6EQz6jp2Dt— Jeff Zimmerman (@jeffwzimmerman) April 26, 2022The specific violator being highlighted here is Aaron Civale, who has thrown six different pitches this year, each more than 9% of the time.