John Small was an English professional cricketer who played during the 18th century and had one of the longest careers on record. Born at Empshott, Hampshire, he is generally regarded as the greatest batsman of the 18th century and acknowledged as having been the first to master the use of the modern straight bat which was introduced in the 1760s. He probably scored the earliest known century in important cricket. The strength of the Hambledon/Hampshire team during Small's prime years can be seen in the team being rated the (unofficial) Champion County in 10 seasons: 1766–1771, 1776–1777, 1779 and 1783. He died at Petersfield, where he was in residence for most of his life and where he established businesses.

In cricket, a century is a score of 100 or more runs in a single innings by a batter. The term is also included in "century partnership" which occurs when two batsmen add 100 runs to the team total when they are batting together. A century is regarded as a landmark score for batters and a player's number of centuries is generally recorded in their career statistics. Scoring a century is loosely equivalent in merit to a bowler taking a five-wicket haul, and is commonly referred to as a ton or hundred. Scores of more than 200 runs are still statistically counted as a century, although these scores are referred to as double, triple, and quadruple centuries, and so on. Reaching 50 runs in an innings is known as a half-century.