NHL, Soccer - Written by jeff on Friday, June 5, 2009 5:05 - 5 Comments

Goals are Good

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Sidney Crosby and Cristiano Ronaldo both need to score first to win.Sidney Crosby and Cristiano Ronaldo are widely regarded as the best individual hockey and soccer players, respectively. But what makes a good hockey or soccer player? Do you want a player who can score first, or who can score last? Fortunately, some new developments in statistics may shed some light on this question.

Jack Brimberg and Bill Hurley of The Royal Military College set out to model the odds of winning in hockey or soccer after scoring first. They calculated the probability of the “first-goal team” winning the match after the first goal is scored based on the number of minutes remaining in the game. Their big break came when they discovered that hockey and soccer follow the Poisson distribution.

After adjusting for external factors, such as league position and seasonal performance, they came up with some interesting findings. Let’s assume team X is playing team Y. From the first whistle, team X has a 50:50 chance of winning. However, if the team scores 5 minutes into the match, with 55 minutes remaining in the game, then the team’s chances of winning rise to 70%. And, if they score the first goal much later in the game, with say, 25 minutes remaining, then their chance of winning the match rises to 80%.

It may not be earth-shattering to say that the team that scores first is more likely to win the game – but these numbers do shake things up a bit when you start to think about who the best players are. The player who scores the first goal in a game may be more valuable than the player who makes front-page-grabbing or “game-winning” plays that occur after the first goal.

Do Crosby and Ronaldo increase their teams’ chances of winning by getting that all-important first goal? Or do they merely swoop in after the first goal is scored with a flashy play or two to claim glory in the highlights tape? They’ve certainly had their share of flashy plays, but who knows -maybe they score the first goal, too.



5 Comments

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moises
Jun 5, 2009 7:52

Interesting but I think they are great players. I mean they score a lot of goals.

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duder maggee
Jun 5, 2009 21:44

“with 55 minutes left to play in the first period of a hockey match”

you mean, with 15 minutes left in the first period of a hockey GAME? it’s a GAME, not a MATCH, first of all (soccer MATCH, hockey GAME). secondly, each period is 20 minutes, for a total of 60. thus, it’s with 15 minutes left in the first period, or 55 minutes left in the game.

is there a way to “undigg” this article due to these mistakes?

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duder maggee
Jun 5, 2009 23:11

However, if the team scores 5 minutes into the match, with 55 minutes remaining in the game, then the team’s chances of winning rise to 70%. And, if they score the first goal much later in the game, with say, 25 minutes remaining, then their chance of winning the match rises to 80%.

still a game, not a match…. c’mon jeff!

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Woah
Jun 19, 2009 18:38

Well i think this was an already established point. In a game like basketball where you have 35-45 FGM per team per game the significance of each field goal is diminished. But in a game like hockey or soccer where only 2-5 goals are put in per team per game then the significance of each goal becomes that much more. A similar point is with turnovers in football. Turnovers in football are committed at a similar rate as goals are scored in soccer. So the team that commits the smaller amount of turnovers has a higher likelihood of winning. I believe that the team that has a +2 turnover margin in football has a 77% higher chance of winning (you might wanna check my numbers on this).

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Mike
Jun 19, 2009 19:47

Hey just found this article. The poisson distribution is a great thing. You would think a game like baseball would follow the same rules like woah says but it doesn’t. Therefore the prediction models aren’t as accurate. I wish you could do that. I would think that it would be interesting to see which players score the most first goals in sports that follow the poisson distribution. By definition they would be the most important players.

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