Roth did stats for the Brooklyn and LA Dodgers until 1964 and developed the RBI percentage (batting average with runners in scoring position). He charted every pitch and did the requisite calculations either in his head or with a simple calculator, insisting on working by hand throughout his career. He began working the NBC and ABC games of the week until 1990, feeding pertinent information to the broadcasters in the booth such as Al Michaels.

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