A seemingly intrinsic part of the game of baseball is the keeping of statistics on the achievements of the players. Started by Henry Chadwick in the 19th century who devised the concept of batting average based on his experience of cricket. Commonly used statistics are explained here:
... Common Life. His writings are
all of a devotional character and include tracts and
meditations, letters, sermons, a life of Saint Lydewigis[?],
a Christian woman who ...