Umpire Mike Muchlinski (76) calls a balk on Los Angeles Dodgers pitcher Sergio Romo as Dodgers catcher Yasmani Grandal, left, looks on and Arizona Diamondbacks' A.J. Pollock, right, signals to the bench about the balk during the eighth inning of a baseball game Friday, April 21, 2017, in Phoenix. The Diamondbacks defeated the Dodgers 13-5. (AP Photo/Ross D. Franklin)
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