Marriam-Websters dictionary definition:
Main Entry: sa·ber·met·ricsPronunciation: \ˌsā-bər-ˈme-triks\Function: noun plural but singular in constructionEtymology: saber- (from Society for American Baseball Research) + -metrics (as in econometrics)Date: 1982: the statistical analysis of baseball data
— sa·ber·me·tri·cian \ˌsā-bər-mə-ˈtri-shən\ noun
h/t Baseball Musings