Account Management

Teams & Rankings

Teams

TeamWinsLossesCompetition LevelGender DivisionCityState
Hasselhoff's Rolex 0 0 ClubMixedGlastonburyCT
"Parkland" PLU Alumni 3 4 ClubMenParklandWA
2016 WJUC East Tryouts - Boys 0 0 Youth Club U19BoysOrlandoFL
2016_Volunteers_College 0 0 VolunteersNARaleighNC
2016_Volunteers_CollegeD3 0 0 VolunteersNAWinston-SalemNC
2016_Volunteers_CollegeD3 0 0 VolunteersNAAdvanceNC
2016_Volunteers_HSCentrals 0 0 VolunteersNAAmesIA
2016_Volunteers_HSNortheasterns 0 0 VolunteersNASlippery RockPA
2016_Volunteers_HSSoutherns 0 0 VolunteersNAAtlantaGA
2016_Volunteers_HSWesterns 0 0 VolunteersNACorvallisOR
2016_Volunteers_Masters 0 0 VolunteersNAAuroraCO
2016_Volunteers_USOpen 0 0 VolunteersNAWest KingstonRI
2016_Volunteers_YCC 0 0 VolunteersNABlaineMN
6ixers 11 0 ClubWomenTorontoOntario
7 Express 9 11 ClubMixedNew YorkNY
7 Figures 5 7 ClubMixedLos AngelesCA
7 Local 0 8 Youth Club U19MixedNew YorkNY
8 Bit Heroes 6 7 ClubMixedFrederickMD
8$OLD (SOL) 9 4 ClubMenState CollegePA
A Moose Bouche 0 0 ClubMixedEast Burke/HartfordVT
Rows: 1 - 20 of 3108

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NameStatusRank SetCreate DateLinks
TCT Women's Rankings (8.24.2016) - End of regular season Published Club Women 8/24/2016 8:39:04 AM Team Rankings
TCT Mixed Rankings (8.24.2016) - End of regular season Published Club Mixed 8/24/2016 8:38:56 AM Team Rankings
TCT Men's Rankings (8.24.2016) - End of regular season Published Club Men 8/24/2016 8:38:46 AM Team Rankings
2016 College Men's - Rankings June 10 - Post Nationals Published College Men 6/10/2016 2:00:22 PM Team Rankings
2016 College Women's - Rankings June 10 - Post Nationals Published College Women 6/10/2016 1:59:55 PM Team Rankings
Rows: 1 - 5 of 5   Page: 1 of 1

About the USA Ultimate Rankings Algorithm

 
The USA Ultimate Rankings (version 2.0) are used in the College and Club regular seasons to help determine strength wildcard bid allocation throughout the series. The algorithm becomes more accurate later in the season as more valid scores are provided by tournament directors and teams.
 
The most basic explanation of this rating system is this: for each game a team plays, the team gets a game rating. These ratings are then averaged over all games played by a team.
 
The next level of complexity is how to compute the points for a given game, and how to average them.  The points for a given game is given by the opponent's rating plus or minus (in the case of a win or loss, respectively) some rating differential x.
 
The number x is a function of the score. Here is the general formula for it:
 
Algo
 Algo2
 
The function was chosen to have the following properties:
  • each additional goal is worth more when games are close than when they are not;
  • every game decided by one point gets the same differential of 125, no matter the game total;
  • the maximum x can be is 600;
  • a game earns the maximum differential if and only if the winning score is more than twice the losing score.
Here is a partial table of differentials under this formula:
 
Algo3
Algo3
 
As an example, suppose team A beats team B 15-11. For a 15-11 game, x = 381. Suppose, further, that team B has a rating of 1010. Then the game rating earned by team A is 1010 381, or 1391.
 
So, suppose team A has played in 4 games, and each individual game rating is 1298, 913, 1410, and 1103. To determine A's overall rating, we take a weighted average of those numbers, where the weight depends upon how recently the game was played. Games in the first week of the regular season will get a weight of 0.5, while games in the last week of the season get a weight of 1.0. Weights of games in intermediate weeks are interpolated exponentially, so that each week's weight is a fixed multiple of the previous week's weight.
 
This averaging is done in an iterative process. First, we temporarily set every team's rating to 1000, and compute each individual game rating and take averages. This gives each team a new rating. Then, we re-compute the game ratings and averages, using this new set of ratings, to get yet another set of ratings.  We do this thousands of times until the rating for each team has stabilized. If some team does really well, and, after the first iteration their rating goes up 250 points, then, on the second iteration, all teams that have played the first team will go up by a smaller amount, and on the third iteration, all the teams that have played the teams that played the first team will go up by a small amount, and so on.
 
Finally, if a team is rated more than 600 points higher than its opponent, and wins with a score that is more than twice the losing score plus one, the game is ignored for ratings purposes. However, this is only done if the winning team has at least N other results that are not being ignored, where N=5.*
 
* This addition to the algorithm was not yet finalized prior to the first event of the 2014 season, however it is currently in place and active for the season.    
 
USA Ultimate continues to look to improve its rankings algorithm through consultation with volunteers on the Algorithm Taskforce.  The review process is ongoing as we look to enhance the level of competition and goals of USA Ultimate. Any additional changes/alterations to the Algorithm will be communicated as they occur.
 
Below is a description of a change to the rankings algorithm used in 2013:
 
The modification to the algorithm removes the possibility that a team rated more than 600 points higher than its opponent will drop in rating when beating that team by a large enough point differential. The game is preserved to serve as a connection between teams but does not impact the actual rating of either of the respective teams involved. USA Ultimate continues to look to improve its rankings algorithm through consultation with Rodney Jacobson, Sholom Simon and other volunteers on the Algorithm Taskforce.

 
  College Rankings: 1987-2015   Club Rankings: 2012-2015
 
 
  2010s   2000s   1990s   1980s  
      2009   1999   1989  
      2008   1998      
      2007   1997   1987  
      2006   1996      
  2015   2005   1995      
  2014   2004   1994      
  2013   2003   1993      
  2012   2002   1992      
  2011   2001   1991      
  2010   2000   1990      
 
 
  2010s        
           
           
           
           
  2015        
  2014        
  2013        
  2012