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Pitcher Accuracy Through Catcher Spotting: Assessing Rater Reliability

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  • Thomas Andrew

    (Carnegie Mellon)

Abstract

Pitcher intent, as measured by the position of the catcher's glove before a pitch is thrown, is an element of baseball that is regularly observed by commentators (he's missing his spots) but remains an uncaptured aspect of statistical analysis of the game, offering many potential aspects on pitcher performance that have yet to be exploited. In order to collect this data systematically for public consumption (a far from trivial task), I propose and design a number of mechanisms for manual collection of this data from video playback using an offine charting approach, the direct indication of catcher position on the video, or a combination of the two. Through a pilot study conducted via a web applet, I find that there are considerable advantages to the direct-on-video method of charting catcher spots, including a higher inter-rater reliability as a consequence of higher precision and fewer replays needed of each pitch for a measurement to be taken, suggesting that direct video analysis, rather than lower-tech zone assessment, will be the preferred method for collecting catcher spotting data as the method becomes more popular.

Suggested Citation

  • Thomas Andrew, 2011. "Pitcher Accuracy Through Catcher Spotting: Assessing Rater Reliability," Journal of Quantitative Analysis in Sports, De Gruyter, vol. 7(2), pages 1-13, May.
  • Handle: RePEc:bpj:jqsprt:v:7:y:2011:i:2:n:16
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    References listed on IDEAS

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    1. Tunaru Radu S & Viney Howard P, 2010. "Valuations of Soccer Players from Statistical Performance Data," Journal of Quantitative Analysis in Sports, De Gruyter, vol. 6(2), pages 1-23, April.
    2. Isidoro Guzmán & Stephen Morrow, 2007. "Measuring efficiency and productivity in professional football teams: evidence from the English Premier League," Central European Journal of Operations Research, Springer;Slovak Society for Operations Research;Hungarian Operational Research Society;Czech Society for Operations Research;Österr. Gesellschaft für Operations Research (ÖGOR);Slovenian Society Informatika - Section for Operational Research;Croatian Operational Research Society, vol. 15(4), pages 309-328, November.
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