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Associated Press
Home plate umpire Dean Poteet, center, exchanges lineups with San Rafael Pacifics manager Matt Kavanaugh, left, and Vallejo Admirals manager Gary Templeton II, right, before the start of an independent minor league baseball game Tuesday, July 28, 2015, in San Rafael, Calif. On Tuesday night, a computer system stood in for pitch calls in what is considered to be the first professional game without the umpire making those decisions. A full umpiring crew will be there for everything else.(AP Photo/Eric Risberg)

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