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Champion Data explains the meaning of 12 AFL stats
June 16, 2017
STATS were easy when kicks, marks and handballs were all that was recorded in the paper the next day.
When inside-50s and clearances were added we were still pretty sure what was going on.
Then we started hearing about score involvements, turnovers, giveaway turnovers, forced turnovers ... and it felt like you needed a degree to know what was happening on the footy field.
Luckily, the AFL’s stats gurus at Champion Data are here to help.
They have spent years finetuning the stats that record what really matters in games, which is why they are used by all the AFL clubs and form the unique SuperCoach scoring system.
To answer one common question from the start, possessions and disposals are not the same thing, although the terms are often used interchangeably. A possession is how a player wins the ball and a disposal is how he gets rid of it. So it is possible for a player to win a possession — for example, by marking just before the siren, but not record a disposal.
Here are 12 more misunderstood stats and what they mean.
METRES GAINED
Net distance gained with the ball by a player during a match by running with the footy, kicking or handballing. Backwards kicks and handballs take away from the total of metres gained towards goal to give a final total.
PRESSURE ACT
Each disposal has pressure assigned to it, ranging from no pressure for a set position to closing, corralling, chasing or physical pressure. A pressure act is when a player has applied either closing, corralling, chasing or physical pressure.
PRESSURE POINTS
Weighted sum of pressure acts. Under the Champion Data pressure point scoring system physical pressure acts are worth 3.75 points, closing pressure acts are worth 2.25 points, chasing pressure acts are worth 1.50 points, and corralling pressure acts which are worth 1.20 points.
KICK RATING
The difference between a player’s expected hit rate (number of times he hits an intended target) and actual hit rate. A negative kick rating indicates a player is not executing the kicks as well as the competition average and a positive kick rating shows a player is hitting the target more often than the competition average. Note that a kick that goes to a teammate counts as effective even if it doesn’t travel the 15m required for a mark.
INTERCEPT POSSESSION
Any possession that is won that breaks an opposition chain.
TACKLE EFFICIENCY
Percentage of physical pressure acts that lead to an effective tackle (that results in no disposal or an ineffective or clanger disposal).
SCORE INVOLVEMENT
Any scoring chain a player was involved in with either a disposal, hitout-to-advantage, kick-in or knock-on. If a player has more than one disposal in the same chain, he is only credited with one score involvement. A score assist is the disposal, hitout-to-advantage or knock-on that directly preceeds a score. (A hitout-to-advantage is a hitout that leads to a teammate gaining direct possession of the ball with the opportunity to dispose of it).
SCOREBOARD IMPACT
A score assigned by Champion Data by combining points scored from goals and behinds plus score assists. Goal and goal assists are worth six points each, and behinds and behind assists are worth one point each.
TURNOVER
Losing possession to the opposition in general play. General play excludes events that happen between a stoppage and the clearance.
GIVEAWAY TURNOVER
A turnover that directly hands possession to the opposition, usually via a clanger disposal. Giveaway turnovers can be forced or unforced.
FORCED TURNOVER
A turnover committed under significant pressure, which directly results in an opposition possession. For example, when a player is tackled as he kicks the ball and it is marked by an opponent.
UNFORCED TURNOVER
A turnover committed under little or no pressure, which directly results in an opposition possession.
heraldsun.com.au ›
Champion Data explains the meaning of 12 AFL stats
June 16, 2017
STATS were easy when kicks, marks and handballs were all that was recorded in the paper the next day.
When inside-50s and clearances were added we were still pretty sure what was going on.
Then we started hearing about score involvements, turnovers, giveaway turnovers, forced turnovers ... and it felt like you needed a degree to know what was happening on the footy field.
Luckily, the AFL’s stats gurus at Champion Data are here to help.
They have spent years finetuning the stats that record what really matters in games, which is why they are used by all the AFL clubs and form the unique SuperCoach scoring system.
To answer one common question from the start, possessions and disposals are not the same thing, although the terms are often used interchangeably. A possession is how a player wins the ball and a disposal is how he gets rid of it. So it is possible for a player to win a possession — for example, by marking just before the siren, but not record a disposal.
Here are 12 more misunderstood stats and what they mean.
METRES GAINED
Net distance gained with the ball by a player during a match by running with the footy, kicking or handballing. Backwards kicks and handballs take away from the total of metres gained towards goal to give a final total.
PRESSURE ACT
Each disposal has pressure assigned to it, ranging from no pressure for a set position to closing, corralling, chasing or physical pressure. A pressure act is when a player has applied either closing, corralling, chasing or physical pressure.
PRESSURE POINTS
Weighted sum of pressure acts. Under the Champion Data pressure point scoring system physical pressure acts are worth 3.75 points, closing pressure acts are worth 2.25 points, chasing pressure acts are worth 1.50 points, and corralling pressure acts which are worth 1.20 points.
KICK RATING
The difference between a player’s expected hit rate (number of times he hits an intended target) and actual hit rate. A negative kick rating indicates a player is not executing the kicks as well as the competition average and a positive kick rating shows a player is hitting the target more often than the competition average. Note that a kick that goes to a teammate counts as effective even if it doesn’t travel the 15m required for a mark.
INTERCEPT POSSESSION
Any possession that is won that breaks an opposition chain.
TACKLE EFFICIENCY
Percentage of physical pressure acts that lead to an effective tackle (that results in no disposal or an ineffective or clanger disposal).
SCORE INVOLVEMENT
Any scoring chain a player was involved in with either a disposal, hitout-to-advantage, kick-in or knock-on. If a player has more than one disposal in the same chain, he is only credited with one score involvement. A score assist is the disposal, hitout-to-advantage or knock-on that directly preceeds a score. (A hitout-to-advantage is a hitout that leads to a teammate gaining direct possession of the ball with the opportunity to dispose of it).
SCOREBOARD IMPACT
A score assigned by Champion Data by combining points scored from goals and behinds plus score assists. Goal and goal assists are worth six points each, and behinds and behind assists are worth one point each.
TURNOVER
Losing possession to the opposition in general play. General play excludes events that happen between a stoppage and the clearance.
GIVEAWAY TURNOVER
A turnover that directly hands possession to the opposition, usually via a clanger disposal. Giveaway turnovers can be forced or unforced.
FORCED TURNOVER
A turnover committed under significant pressure, which directly results in an opposition possession. For example, when a player is tackled as he kicks the ball and it is marked by an opponent.
UNFORCED TURNOVER
A turnover committed under little or no pressure, which directly results in an opposition possession.