LaxNumbers was developed with assistance from the Ontario Lacrosse Association (OLA) as it's official statistical database. Both the OLA and LaxNumbers want to expand the use of the site to cover box and field lacrosse, wherever it is played.
2. How does LaxNumbers compute its ratings?
LaxNumbers 's ratings are computed mathematically, with no subjective weighting
or human determined values. LaxNumbers rates teams based upon how well they play against other teams and
how good those teams are. These two factors are "AGD" or "average goal
differential" and "SCHED" or "strength of schedule". AGD is currently
calculated by accumulating the goal differential of each game.
The strength of schedule is computed by averaging the rating of each game
opponent. AGD and SCHED are added together to compute a team's rating.
3. Are some teams or zones given preferential treatment?
There is no preferential treatment for teams from certain zones. All teams are
assumed to be equal and having a rating of zero before the system mathematically
calculates your SCHED and AGD based entirely upon game performance. A team's
SCHED is not only determined by the teams it plays, but by the teams its
opponents play and its opponents' opponents play, etc. All teams in a given age
level (i.e. Midgets) are ranked in one statistical pool. The math does not know
what zone a team is from or any of the historical ratings of a team, it simply computes a rating based upon who a team
has played (SCHED) and how well they have done (AGD) for the games recorded in the current season.
4. How accurate can this be?
In general, as teams start getting 10+ games under their belts, the system tends to be
very accurate. There are, however, some occasional exceptions.
If a group of teams (i.e. zone) doesn't play others outside its group, their placement
relative to all other teams cannot be accurately be determined, but relative
to one another it is accurate. Groups of teams
with limited outside play can be inaccurately skewed by the scores of only
a few games, which might not be representative of the group's overall ability. Accuracy
significantly increases with more games and more interplay and it makes sense for there
to be a minimum number of games before teams are ranked.
Assuming teams have all played enough games against both league and non-league
teams, inaccuracies may still exist. Some teams play differently (a lot differently)
depending upon which goalie is in net for a specific game. In this case, the ratings
average out the play and may not completely reflect either scenario. Missing players,
home vs. away, double rostered players are a few other scenarios that could influence the
accuracy of the ratings. It's not an exact science. The ratings should be used to
determine what teams might be good non-league opponents and which bracket of a tournament
may be more appropriate, they are not meant to be the AP Poll for youth lacrosse.
There are a couple weaknesses to the current system. The first deficiency is with
teams that emphasize development in some games. They are "penalized". That same team
may then focus on winning big tournaments and succeed, but may never achieve the
rating that they "deserve". Secondly, teams that "come on" in the second half of the season
are "penalized" by early poor performances. All games throughout the season count
equally and that may not reflect a teams performance near the end of the season.
5. We beat Team X twice, how can they still be ranked ahead of us?
Yes, it seems wrong, but a team that you have a winning record against can be ranked ahead
of you. It's all in mathematics. It depends on who else your team has played and how well
you did as well as who the other team has played and how well they did. In a season of
games, there will be some anomalies.
6. We won both our games this past weekend and our rating went down, how is this?
Your rating can go down even though your team wins. This can happen for a couple different reasons.
First, if your team is rated 3.0 points (1 point = 1 goal) better than your opponent and you win two
close games by 1 goal each, your average goal differential (AGD) is +1.0
against a team that it was expected to be +3.0. This would likely have a negative impact on your rating.
Another scenario has you doing as expected against your opponent, but a large percentage of the teams
you played earlier in the season doing unexpectedly bad. This lowers your strength of schedule and would
lower your team's rating. It is almost impossible to guess how much and in what direction your rating
will move each week because of the complexity of the math.
LaxNumbers now has available a page that explains the mathematics behind the rating.
From the team information page, you can find a link to the math
page by clicking on the icon just to the right of the rating.
7. What does a team's overall rating number mean?
Everything is relative. The number specifically means nothing, but might be
used to understand the relative competitiveness of two different teams. A 1.0 point differential
equates to a theoretical goal 1.0 goal advantage by the team with the higher point value.
8. What does each of the columns on the ratings page mean?
"Record" is represented by wins-loses-ties. As described above, the "Rating" is simply the sum
of the "AGD" and "SCHED". "AGD" is average goal differential. This can be a
positive or negative number that equals goals for (GF) minus goals against (GA) divided
by games played (GP). One caveat, the system currently has a maximum goal differential of ten (10)
for any single game played. This means that if a team plays a number of games decided by
more than seven goals, it's not quite as simple as GF-GA/GP. "SCHED" is the average strength of
schedule of all opponents. Fundamentally you can add the "RATING" for all opponents and divide
by GP. "Details" will give you more information about the team while "Scores" is a link to
a team's complete set of season game scores as recorded in LaxNumbers.
A couple hints to give you the full power of LaxNumbers. Any teams with known team websites will
be represented by underline/hotlinked team names. Clicking on the team name will open an
additional window to this team's web site. When viewing scores, each opponent's schedule is
just a click away. For example, if you are viewing the game scores of Team X and they played
Team Y, you can view Team Y's game scores by simply clicking on Team Y's name.
9. Which teams are being ranked?
LaxNumbers now includes Boys and Girls, Tyke through Intermediate Box Lacrosse teams throughout Ontario.
We will begin building out the system to include US and Canada club teams in the near future.
Want to help? Send LaxNumbers an email. Let's make it happen together.
10. A game score is incorrect, how do I get it corrected?
Next to every score in the database is a red check mark in the "Fix" column. If a score is incorrect, click on
the corresponding check mark to request that it be fixed. Please provide documentation (website that has the
correct score posted is preferable) and tell us specifically how to fix the score. If the score is a duplicate,
especially an incorrect duplicate, make sure you request that we delete the duplicate score.
11. My local association information is incomplete or inaccurate, how do I get it corrected?
LaxNumbers is working on making all information correctable via an online form, but association information has not
yet been completed. You will see a pencil icon just to the right of association information when the online correction
form has been implemented. Until then, use the contact information found on the Contact Info page.