Bases on balls per 9 innings pitched
Encyclopedia
In baseball statistics
, bases on balls per 9 innings pitched (BB/9IP or BB/9) or walks per nine innings (denoted by W/9) is the average number of bases on balls, (or walks) given up by a pitcher
per nine innings pitched
. It is determined by multiplying the number of bases on balls allowed by nine and dividing by the number of innings pitched. It is a measure of the bases on balls ability of a pitcher.
Baseball statistics
Statistics play an important role in summarizing baseball performance and evaluating players in the sport.Since the flow of a baseball game has natural breaks to it, and normally players act individually rather than performing in clusters, the sport lends itself to easy record-keeping and statistics...
, bases on balls per 9 innings pitched (BB/9IP or BB/9) or walks per nine innings (denoted by W/9) is the average number of bases on balls, (or walks) given up by a pitcher
Pitcher
In baseball, the pitcher is the player who throwsthe baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw a walk. In the numbering system used to record defensive plays, the...
per nine innings pitched
Innings pitched
In baseball, innings pitched are the number of innings a pitcher has completed, measured by the number of batters and baserunners that are put out while the pitcher on the pitching mound in a game. Three outs made is equal to one inning pitched. One out counts as one-third of an inning, and two...
. It is determined by multiplying the number of bases on balls allowed by nine and dividing by the number of innings pitched. It is a measure of the bases on balls ability of a pitcher.