Catchers were far more successful than batters through Major League Baseball's first full week of challenges to robot umpires, led by the Detroit Tigers and David Dingler. The overall success rate in the Automated Ball-Strike System was 55.2% (299 of 542), with fielding teams winning 59.7% of challenges (175 of 293), including 60.4% by catchers (169 of 280). There were just 13 challenges by pitchers, who won six.
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