If you want to understand how he ranks the teams read below:
Most sport teams are ranked by the simple Win/Loss record or winning percentage. So a team that wins 7 out of 10 games (70%) has a higher ranking than a team that wins 4 out of 10 (40%) games.
However, this simple calculation does not take into account that each team can play different teams (conferences/strength of competition) or that teams do not play each other the same number of times (as in my favorite sport - Australian Rules Football (AFL) - "Oh when the SAINTS....").
Two popular sports ranking systems are the Colley Method and the Massey Method. A comparison of the different methods from previous AFL seasons are in the tables below. The "Finals" or playoff method was the eventual outcome, Massey predicted this more accurately than the other methods (a short 3 minute video on the "Sports Data and Software" page shows how this Massey ranking was obtained).
Massey has the current Australian Football rankings - https://www.masseyratings.com/aufl/ratings
|West Coast||Adelaide||Hawthorn||West Coast|
|North Melbourne||North Melbourne||North Melbourne||North Melbourne|
|West Coast||West Coast||West Coast||West Coast|
|Hawthorn||Fremantle||Sydney Swans||Sydney Swans|
|Sydney Swans||North Melbourne||Fremantle||Hawthorn|
|Richmond||Sydney Swans||Adelaide||West Bulldogs|
|North Melbourne||West Bulldogs||Port Adelaide||North Melbourne|
|Hawthorn||Sydney Swans||Sydney Swans||Geelong Cats|
|Geelong Cats||Port Adelaide||Port Adelaide||Sydney Swans|
|Port Adelaide||North Melbourne||North Melbourne||Port Adelaide|
|North Melbourne||Geelong Cats||Geelong Cats||North Melbourne|
These 2 methods are used extensively in Collegiate Basketball and Football in USA and in a tournament called "March Madness" where the top 64 out of about 350 collegiate men's basketball teams play off in a knock out competition.
Each method uses High School Maths (linear algebra, matrices, least squares and network graphs), which makes these methods really useful to teach students and adds to the movement of "making Maths more relevant and interesting". I will outline some class activities within the Colley and Massey page links (on the left).
Please post or contact me via my Google+ profile below if you have any interesting tournaments - I would like to create a work book for students.
Sports results can be downloaded and used in programs to rank the teams - click here.
Some other good AFL Stats sites -