Baseball Primer Newsblog
— The Best News Links from the Baseball Newsstand
Monday, August 13, 2007
In the new study, Hamermesh’s team analyzed the calls on 2.1 million pitches thrown in the Major League between the 2004 and 2006 seasons. Controlling for all other outside factors, such as the pitcher’s tendency to throw strikes, the umpires’ tendency to call strikes and the batter’s ability to attract balls, researchers found evidence of same-race bias — and the data revealed that the bias benefits mostly white pitchers. Not surprising, since 71% of MLB pitchers and 87% of umpires are white.
The highest percentage of strikes were called when both the home-plate umpire and pitcher were white, and the lowest percentage were called between a white ump and a black pitcher. The study also found that minority umpires judged Asian pitchers more unfairly than they did white pitchers. It’s a significant disadvantage for Asian pitchers because the MLB doesn’t have any Asian umpires. Interestingly enough, Hamermesh’s research found that the race of the batter didn’t seem to matter — the correlation was only between the pitcher and the home-plate ump. Rich Levin, an MLB spokesman, refused to comment on the research findings.
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