Sabermetrics

Sabermetrics (originally SABRmetrics) is the original or blanket term for sports analytics in the US, the empirical analysis of baseball, especially the development of advanced metrics based on baseball statistics that measure in-game activity. The term is derived from the movement's progenitors, members of the Society for American Baseball Research (SABR), founded in 1971, and was coined by Bill James, (in 1980, according to SABR.org), who is one of its pioneers and considered its most prominent advocate and public face.

The term moneyball refers to the use of metrics to identify "undervalued players" and sign them to what ideally will become "below market value" contracts; it began as an effort by small-market teams to compete with the much greater resources of big-market ones.