Goals against average (GAA) also known as "average goals against" or "AGA" is a

statistic A statistic (singular) or sample statistic is any quantity computed from values in a sample which is considered for a statistical purpose. Statistical purposes include estimating a population parameter, describing a sample, or evaluating a hy ...

used in

field hockey Field hockey is a team sport structured in standard hockey format, in which each team plays with ten outfield players and a goalkeeper. Teams must drive a round hockey ball by hitting it with a hockey stick towards the rival team's shootin ...

ice hockey Ice hockey (or simply hockey) is a team sport played on ice skates, usually on an Ice rink, ice skating rink with Ice hockey rink, lines and markings specific to the sport. It belongs to a family of sports called hockey. In ice hockey, two o ...

lacrosse Lacrosse is a team sport played with a lacrosse stick and a lacrosse ball. It is the oldest organized sport in North America, with its origins with the indigenous people of North America as early as the 12th century. The game was extensi ...

, soccer, and

water polo Water polo is a competitive team sport played in water between two teams of seven players each. The game consists of four quarters in which the teams attempt to score goals by throwing the ball into the opposing team's goal. The team with t ...

that is the

mean There are several kinds of mean in mathematics, especially in statistics. Each mean serves to summarize a given group of data, often to better understand the overall value ( magnitude and sign) of a given data set. For a data set, the '' ari ...

of goals allowed per game by a

goaltender In ice hockey, the goaltender (commonly referred to as the goalie) is the player responsible for preventing the hockey puck from entering their team's net, thus preventing the opposing team from scoring. The goaltender mostly plays in or near t ...

or goalkeeper (depending on sport). GAA is analogous to a

baseball Baseball is a bat-and-ball sport played between two teams of nine players each, taking turns batting and fielding. The game occurs over the course of several plays, with each play generally beginning when a player on the fielding ...

pitcher In baseball, the pitcher is the player who throws ("pitches") the Baseball (ball), baseball from the pitcher's mound toward the catcher to begin each play, with the goal of out (baseball), retiring a batter (baseball), batter, who attempts to e ...

earned run average In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the numb ...

(ERA). In Japanese, the same translation (防御率) is used for both GAA and ERA, because of this. For ice hockey, the goals against average statistic is the number of goals a goaltender allows per 60 minutes of playing time. It is calculated by taking the number of goals against, multiply that by 60 (minutes) and then dividing by the number of minutes played. The modification is used by the NHL since 1965 and the IIHF since 1990. When calculating GAA, overtime goals and time on ice are included, whereas empty net and shootout goals are not. It is typically given to two decimal places. The top goaltenders in the

National Hockey League The National Hockey League (NHL; french: Ligue nationale de hockey—LNH, ) is a professional ice hockey sports league, league in North America comprising 32 teams—25 in the United States and 7 in Canada. It is considered to be the top ranke ...

have a GAA of about 1.85-2.10, although the measure of a good GAA changes as different playing styles come and go. The top goaltenders in the National Lacrosse League however, have a GAA of about 10.00, and the top 2005 Western Lacrosse Association goaltenders had a GAA of about 9.00. At their best, elite NCAA water polo goalies have a GAA between 3.00 and 5.00. Since the statistic is highly dependent on the team playing in front of a goalie,

save percentage Save percentage (often known by such symbols as SV%, SVS%, SVP, PCT) is a statistic in various goal-scoring sports that track saves as a statistic. In ice hockey and lacrosse, it is a statistic that represents the percentage of shots on goal ...

is usually considered a more accurate measure of a goaltender's skill, especially in ice hockey and lacrosse, as it takes into account the number of shots the goaltender has faced. In soccer, since it is considered a part of the goalkeeper's job to coach defenders on proper positioning to prevent opponents' shots, GAA is more commonly used to evaluate goalkeepers than save percentage.

References

{{DEFAULTSORT:Goals Against Average Ice hockey statistics