Crooked numbers in baseball refer to a number greater than one that has been added to the line score as a result of a half-inning run. The line score depicts the runs, hits, and mistakes committed by each team throughout a game.
Line scores are separated into nine columns, one for each inning, and two rows, one for each participating team. During a half inning, either the visiting or the home team has the opportunity to score. When a team scores two or more runs during their at-bat in an inning, they are considered to have posted a crooked number. Because they are neither straight like ones nor rounded like zeros, crooked numbers are referred to as crooked. A team is considered to have erected a picket fence if it scores a single point in each of multiple consecutive half innings, as the series of ones resemble the boards of a fence.