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:
... them, 52.8% are married couples living together, 6.8% have a female householder with no husband present, and 37.6% are non-families. 27.7% of all households are made up ...