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{{Short description|Baseball term for a valid batting attempt}}
[[Image:Ichiro Suzuki bottom of the 3rd inning July 6 2009.JPG|thumb|right|350px|[[Ichiro Suzuki]] at bat]]
In [[baseball]], an '''at bat''' ('''AB''') or '''time at bat''' is a [[batting (baseball)|batter]]'s turn batting against a [[pitcher]]. An at bat is different from a [[plate appearance]]. A batter is credited with a plate appearance regardless of what happens upon completion of his turn at bat, but a batter is charged with an at bat only if that plate appearance does not have one of the results enumerated below. While at bats are used to calculate certain [[baseball statistics|statistics]], including [[batting average (baseball)|batting average]] and [[slugging percentage]], players can qualify for the season-ending rankings in these categories only if they accumulate 502 plate appearances during the season.

Batters will not be charged an at bat if their plate appearances end under the following circumstances:
* Receiving a [[base on balls]] (BB).<ref group="note">In [[1887 in baseball|1887]], [[Major League Baseball]] counted bases on balls as [[hit (baseball)|hits]] (and thus as at-bats). The result was high [[batting average (baseball)|batting average]]s, including some near .500, and the experiment was abandoned the following season.</ref>
* Being [[hit by pitch|hit by a pitch]] (HBP).
* Hitting a [[sacrifice fly]] or a [[sacrifice bunt]] (also known as sacrifice hit).
* Being awarded [[Baseball field#First base|first base]] due to [[catcher's interference]] or [[Obstruction (baseball)|fielder's obstruction]].
* Being replaced by another hitter before their at bat is completed, in which case the plate appearance and any related statistics go to the [[pinch hitter]] (unless they are replaced with two strikes and their replacement completes a strikeout, in which case the at bat and strikeout are charged to the first batter).
In addition, if the [[Inning (baseball)|inning]] ends during an at bat (due to the third [[out (baseball)|out]] being made by a runner [[caught stealing]], for example), no at bat or plate appearance will result because neither were completed.

An at bat is a specific type of plate appearance in which the batter stands at the plate intending to put the ball in play and get on base. This is why at bats, and not plate appearances, are used to calculate batting average, as plate appearances in general can result in many outcomes that do not necessarily involve putting the ball in play, and batting average specifically measures a batter's contact hitting.

Rule 9.02(a)(1) of the official rules of [[Major League Baseball]] defines an at bat as: "Number of times batted, except that no time at bat shall be charged when a player: (A) hits a sacrifice bunt or sacrifice fly; (B) is awarded first base on four called balls; (C) is hit by a pitched ball; or (D) is awarded first base because of interference or obstruction[.]"<ref name=MLBatbat>{{Cite web|url=http://mlb.mlb.com/documents/0/8/0/268272080/2018_Official_Baseball_Rules.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://mlb.mlb.com/documents/0/8/0/268272080/2018_Official_Baseball_Rules.pdf |archive-date=2022-10-09 |url-status=live|title=Official Baseball Rules|work=[[Major League Baseball]]|publisher=Office of the Commissioner of Baseball|format=PDF|access-date=2018-07-07|edition=2018}}</ref>

==Examples==
An at bat is counted when:
*The batter reaches first base on a [[Hit (baseball statistics)|hit]]
*The batter reaches first base on an [[Error (baseball statistics)|error]]
*The batter [[Strikeout|strikes out]], including a strikeout after which the batter reaches base safely because of a wild pitch or passed ball
*The batter is called [[Out (baseball)|out]] for any reason other than a sacrifice
*There is a [[fielder's choice]]

==Records==
{{See also|List of Major League Baseball career at bat leaders}}

[[Pete Rose]] had 14,053 career at bats, the all-time major league and National League record.<ref>{{cite web|url=https://stathead.com/tiny/SHgxc|title=Player Batting Season Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref><ref>{{cite web|url=https://stathead.com/tiny/LYrJQ|title=Player Batting Season Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref> The American League record is held by [[Carl Yastrzemski]], whose 11,988 career at bats were all in the AL.<ref>{{cite web|url=https://stathead.com/tiny/Odm6c|title=Player Batting Season Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref>

The single season record is held by [[Jimmy Rollins]], who had 716 at bats in 2007. [[Willie Wilson (baseball)|Willie Wilson]], [[Ichiro Suzuki]] and [[Juan Samuel]] also had more than 700 at bats in a season.<ref>{{cite web|url=https://stathead.com/tiny/KeGi5|title=Player Batting Season Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref> 14 players share the single game record of 11 at bats in a single game, all of which were [[extra inning]] games.<ref>{{cite web|url=https://stathead.com/tiny/6y18n|title=Player Batting Game Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref> In games of 9 innings or fewer, the record is 7 at bats and has occurred more than 200 times.<ref>{{cite web|url=https://stathead.com/tiny/55Bvb|title=Player Batting Game Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref>

The team record for most at bats in a single season is 5,781 by the [[1997 Boston Red Sox]].<ref>{{cite web|url=https://stathead.com/tiny/0T3c9|title=Team Batting Season Finder|website=Stathead Baseball|access-date=April 6, 2021}}</ref>

==At bat as a phrase==
"At bat", "up", "up at bat", and "at the plate" are all phrases describing a batter who is facing the pitcher. Just because a player is described as being "at bat" in this sense, he will not necessarily be given an at bat in his statistics; the phrase actually signifies a [[plate appearance]] (assuming it is eventually completed). This ambiguous terminology is usually clarified by context. To refer explicitly to a statistical "at bat", the term "official at bat" is sometimes used.

=== "Time at bat" in the rulebook ===
Official Baseball Rule 5.06(c) provides that "[a] batter has legally completed his ''time at bat'' when he is put out or becomes a runner" (emphasis added). The "time at bat" defined in this rule is more commonly referred to as a [[plate appearance]], and the playing rules (Rules 1 through 8) uses the phrase "time at bat" in this sense.<ref group="note">''See, e.g.,'' Rule 5.04(a)(3), which states that "[t]he first batter in each inning after the first inning shall be the player whose name follows that of the last player who legally completed his ''time at bat'' in the preceding inning" (emphasis added).</ref> In contrast, the scoring rules use the phrase "time at bat" to refer to the statistic '''at bat''', defined in Rule 9.02(a)(1), but sometimes uses the phrase "official time at bat" or refers back to Rule 9.02(a)(1) when mentioning the statistic. The phrase "plate appearance" is used in Rules 9.22 and 9.23 dealing with batting titles and hitting streaks, and in Rule 5.10(g) comment regarding the Three-Batter Minimum: "[t]o qualify as one of three consecutive batters, the batter must complete his plate appearance, which ends only when the batter is put out or becomes a runner." The term is not elsewhere defined in the rulebook.<ref name=MLBatbat/>

==See also==
*[[Batting order (baseball)|Batting order]]
*[[At bats with runners in scoring position]]

== Notes ==
{{Reflist|group=note}}

==References==
{{Reflist}}

{{Baseball}}

[[Category:Batting statistics]]
[[Category:Batting (baseball)]]