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At Bat (AB) is used to calculate certain statistics, including batting average. It is a more restricted definition of a plate appearance.
Plate Appearances= At-Bats + Bases on Balls(Walks) + Hit By Pitch +
Sacrifice Hits + Sacrifice Flies + Times Reached on Defensive
Interference. A batter has an at bat every time he faces a pitcher, except in the following circumstances:
- He receives a base on balls (BB).
- He is hit by a pitch (HBP).
- He hits a sacrifice fly or a sacrifice hit (also known as sacrifice bunt).
- He is awarded first base due to interference or obstruction, usually by the catcher.
- The inning ends while he is still at bat (due to the third out being made by a runner caught stealing,
for example). In this case, the batter will come to bat again in the
next inning, though he now has no balls or strikes on him.
- He is replaced by another hitter before his at bat is completed
(unless he is replaced with two strikes and his replacement strikes
out).
Hit (denoted by H), sometimes called a base hit,
is credited to a batter when the batter safely reaches first base after
hitting the ball into fair territory, without the benefit of an error
or a fielder's choice.
In baseball, the batting average (BA) is defined as the ratio of HITS to AT BATS
Most young players get batting average confused with on-base percentage!
On-Base Percentage (OBP) (sometimes referred to as on-base average [OBA],
as the statistic is rarely presented as a true percentage) is a measure
of how often a batter reaches base for any reason other than a fielding
error, fielder's choice, fielder's obstruction,
or catcher's interference (the latter two are ignored as either
times-on-base (TOB) or plate appearances in calculating OBP). OBP is
added to slugging average to determine on-base plus slugging (OPS). It
first became an official MLB statistic in 1984.
Slugging Percentage (abbreviated SLG ) is the most popular measure of the power of a hitter. It is calculated as total bases divided by at bats:
where AB is the number of at-bats for a given player, and 1B, 2B, 3B, and HR
are the number of singles, doubles, triples, and home runs,
respectively. Walks are specifically excluded from this calculation.
Example: If i walk once, strike out once, fly out once, and hit a homerun
My batting average is: .333 (1 hit in 3 at bats)
My on base percentage is: .500 (1 hit and 1 walk in 4 plate appearances)
My slugging percentage is: 1.33 (4 total bases in 3 at bats)
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