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Old 11-04-2008, 03:24 PM   #1 (permalink)
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Default Save Percentage and GAA For Goalies

does anyone know exactly how save percentage and GAA is figured out? I get mixed up between the two!
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Old 11-04-2008, 04:13 PM   #2 (permalink)
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does anyone know exactly how save percentage and GAA is figured out? I get mixed up between the two!
Save % is done by dividing shots stopped into shots on goal.

For instance, if a goalie stopped 27 of 30 shots, and allowed 3 goals, his save % would be 0.90(Stopped 90% of the shots)

GAA is simply the average goals per game the goaltender allows.

If Brodeur allows 2 goals 1 game, then 4 goals the next game, his GAA is 3.
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Old 11-04-2008, 04:34 PM   #3 (permalink)
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its funny I have been watching Hockey for years and never really studied a goalies stats! so what save percentage is good for save percentage and GAA?
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Old 11-04-2008, 09:17 PM   #4 (permalink)
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its funny I have been watching Hockey for years and never really studied a goalies stats! so what save percentage is good for save percentage and GAA?
In modern times, teams hit the panic button often if a goaltender can not stay above 90%.

GAA is often more of a team stat, as are wins. Even the best goaltender will have a terrible GAA if the team in front of him is not paying attention to defense. Additionally, great goaltenders can often have less stellar Save % by virtue of facing few shots because of the team, but letting in 2 goals on 19 shots.
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Old 11-04-2008, 09:34 PM   #5 (permalink)
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does anyone know exactly how save percentage and GAA is figured out? I get mixed up between the two!
Sv% is the amount of saves a goalie makes to the amount of shots he faces.

GAA is the average amount of goals a goalie lets in per start/game. GAA is very similar to ERA in baseball.

Damn, for some reason the posts are last to first instead of first to last.
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Old 11-04-2008, 10:49 PM   #6 (permalink)
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Sv% is the amount of saves a goalie makes to the amount of shots he faces.

GAA is the average amount of goals a goalie lets in per start/game. GAA is very similar to ERA in baseball.

Damn, for some reason the posts are last to first instead of first to last.
I know thats one thing about this forum thats weird the posts are last to first
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Old 11-05-2008, 03:35 PM   #7 (permalink)
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I know thats one thing about this forum thats weird the posts are last to first
Go to display mode at the top of the forum page and select hybrid mode.
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Old 11-05-2008, 04:03 PM   #8 (permalink)
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GAA is the number of goals per 60 minutes of play.

so GAA is actually

number_of_goals_allowed * 60/minutes_played

so if a goalie has played 1 game an lost 1-0 in the 63rd minute of the game (in OT). Their GAA would be

1 * 60/63 = 0.952
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Old 11-05-2008, 08:17 PM   #9 (permalink)
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GAA is the number of goals per 60 minutes of play.

so GAA is actually

number_of_goals_allowed * 60/minutes_played

so if a goalie has played 1 game an lost 1-0 in the 63rd minute of the game. Their GAA would be

1 * 60/63 = 0.952
How do you get that number?
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Old 11-06-2008, 12:06 AM   #10 (permalink)
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Originally Posted by 4th_Line_Scrub View Post
How do you get that number?
60/63 = 0.95238095238095238095238095238095

I rounded.

The assumption of goals against average is that the average game is 60 minutes.

So if a goalie allows 3 goals and is pulled for the last 1.5 minutes then they actually played 58.5 minutes.

That would mean that their GAA for the game would be slightly over 3.

It would precisely be:

3 goals * 60 minutes (average game)/ 58.5 minutes (time actually played)

So in the above circumstance the GAA would actually be:

3.08

Its really not that complicated when you understand that a goalie can play less than, or more than a full game in the course of a game.

Another example would be a goalie that gives up 4 goals in the first and gets pulled after 20 minutes.

GAA = 4 * 60/20 = 12
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