![](/sites/default/files/imported/Photos/190806_MPR_2H.jpg)
Soccer, Hoops Next to Seed Using MPR
August 6, 2019
By Rob Kaminski
MHSAA benchmarks editor
As the topic of seeding for MHSAA Tournaments continues to swirl in the air of numerous committee meetings on an annual basis, one of the primary concerns continues to focus on the simple question: “How?”
The MHSAA for years has been working behind the scenes on potential formulas which could best be used as a standardized tool to assist in measuring strengths of teams in a given sport.
This spring, the MHSAA introduced the Michigan Power Rating in the sport of Boys Lacrosse. The Representative Council approved limited seeding beginning in 2019-20 for girls and boys soccer and girls and boys basketball, and MPR will be the metric to determine which two teams must be seeded on opposite sides of District brackets in those sports.
“The boys lacrosse tournament has been seeded since it was added as an MHSAA-sponsored sport in 2005. The seeding is done by committee based on several criteria, one of which was statewide power rankings generated by a third-party website. In the Fall of 2018, that website ceased operation – it was the perfect opportunity for the MHSAA to develop its own data-driven, purely objective ratings system and incorporate that data into the seeding criteria,” said Cole Malatinsky, administrative assistant for the sport.
“The benefits of the new MPR system have been already mentioned – it is MHSAA controlled, simple, objective, and transparent, and it can be used by other MHSAA sports in the future.”
MPR is a computer rating formula similar to the popular RPI rating. MPR provides a way to measure a team’s strength relative to other teams, based on games played against other MHSAA tournament teams, largely on the strength of their opponents’ schedules. MPR is purely objective using only the game results listed on MHSAA.com – there is no subjective human element.
What is the basic MPR formula?
MPR is calculated using wins, losses and ties for games played between teams entered into the MHSAA tournament. The final MPR number is 25% of the team's winning percentage, plus 50% of its opponent's winning percentage, plus 25% of its opponent's opponent's winning percentage.
MPR = (.25 x W%) + (.50 x OW%) + (.25 x OOW%)
The MPR formula can be applied easily to other MHSAA team sports.
What game data is included in the formula? What game data is not?
MPR looks only at results between opponents entered into the MHSAA postseason tournament. Wins, losses and ties in multi-team shortened game tournaments (lacrosse, soccer) also count. Forfeits also are counted as wins and losses.
MPR does not use the specific scores of a game or the margin of victory in a game. The location of a game is not included in the MPR formula, and the formula weighs results at the beginning of the season the same as results at the end of the season. Scrimmages are not included.
Why use the MPR formula?
Different rating systems have been used in the past or have been recommended to the MHSAA. We wanted to have a rating system where the data was controlled and stored in house and could be used for any sport featuring head-to-head competitions.
With its own rating system the MHSAA also can control the different components of the formula, thus keeping the tenets of scholastic competition at the forefront (like not including margin of victory in the formula). Finally, by listing all scores and team schedules online, as well as showing the MPR calculator on each team schedule page, the ratings are transparent and can be replicated easily.
CALCULATING MPR
What are the detailed components of the MPR formula?
You need three numbers to calculate your MPR: winning percentage (W%), opponent’s winning percentage (OW%) and opponent’s opponent’s winning percentage (OOW%).
How do you calculate winning percentage (W%)?
Divide the number of wins by the number of total games played. A tie is worth half a win. For MPR purposes, find the winning percentage against all teams that will play in the MHSAA tournament (MPR W%). Games played against out-of-state teams, varsity “B” teams, junior varsity teams, non-school club teams, and any other non-MHSAA tournament participants should not be included when calculating winning percentage. W% should be an easy number to calculate.
How do you calculate opponent’s winning percentage (OW%)?
Average the winning percentages of a team's opponents. When calculating the winning percentage of a specific opponent, use the opponents "Adjusted Winning Percentage" (ADJ W%). Adjusted winning percentage eliminates all games the team played against that opponent (as well as its games against non-MHSAA opponents).
For instance, if the team beat an opponent with an overall record of 4-1, use a record of 4-0 (1.000) for that opponent. If the team lost to an opponent, use a record of 3-1 (.750). Find the ADJ W% for all opponents, and then take the average. If a team plays an opponent team twice, that opponent’s ADJ W% will be counted twice.
OW% is not calculated via the combined record of the opponents; instead take the average of all opponent’s winning percentages.
How do you calculate opponent’s opponent’s winning percentage (OOW%)?
Use the same process described above, except calculated for the opponents of a team's opponents. This number is much harder to manually calculate, so the OW% for every team is listed on the MPR page of the MHSAA website.
Again, simply take the average of all opponent’s OW%.
How often is MPR calculated?
MPR is calculated about every five minutes. Enter a score and a minutes later the team MPR and the MPR of all the team's opponents will update.
How much will my MPR change throughout the season?
You will see wild MPR swings in the beginning of the season, but after about 10 games played your MPR will start to level out. At 20 games played you will see very little movement with each additional game played.
My score is missing. How can it be added?
This is a crowd-sourced system. Any registered user of MHSAA.com can add a missing score. ADs, coaches, parents, students and fans all can login and enter a score for any game.
What are some common errors when calculating MPR?
When calculating your team’s winning percentage, only include games against MHSAA-tournament teams. When calculating your opponent’s winning percentage, don’t include the games they played against you. When calculating ties, count the game as a half-win and half-loss.
What happens if a game is cancelled?
Because the MPR system works off of averages, it will not make a difference in the final MPR if a game cannot be rescheduled. It would not penalize, nor benefit, any team involved in that scenario.
USING THE WEBSITE
Where can I find game scores?
A list of statewide scores for all sports can be found in the MHSAA Score Center. To find a schedule for any team click on “Schools & Schedules” in the top navigation bar, search for the school, then once on the school page click the sport. You can also see a list of all schools (with links to schedules), on the statewide MPR list.
“We continue to have great success in score reporting for varsity boys lacrosse contests. While we state that schedule submission and score reporting to MHSAA.com are required, athletic directors and coaches understand that in order for MPR data to be accurate, we need consistent and accurate score reporting,” said Malatinsky. “MHSAA.com is now the primary site for high school boys lacrosse schedules, results and ratings in the state.”
How should I use the statewide list of teams and MPR?
Linked to the boys soccer page (and eventually to be added for both basketball pages and girls soccer) is a statewide listing of all Michigan Power Ratings (MPR) for teams entered into the MHSAA postseason tournament for that sport. Linked on the MPR page is an explanation of the District draw formula, describing when and how teams will be placed on the bracket.
The MPR data updates every five minutes. Click on the column headings to sort the data. You also can use the drop-down menu to show teams in one Division, or type a District number in the box to filter teams for that District (Region for boys lacrosse).
You also can click on any school name to go to its schedule page.
How do I read the school schedule page?
The schedule at the top of the page shows the date and opponent for all scheduled games, and results for games already played. If results are missing, click “Submit Score” to add a game score.
Below the game schedule is the MPR Calculator. The calculator is split into three sections. The first section shows the three MPR component scores for the team, as well as the team’s current MPR score. The second section shows the MPR information for the team’s opponents – specifically, for the opponents the team already has played (actually, for games where scores have been submitted). Only these games are included in the MPR calculation.
The third section highlights future opponents. The MPR data for future opponents are not used in the MPR calculation for the team.
PHOTO: East Kentwood and Ann Arbor Skyline play for last season’s Division 1 boys soccer championship.
![St. Louis' 4-1 start has included last week's 48-30 win over Lakeview.](/sites/default/files/2023-12/231208_gbb_2H.jpg)
Breslin Bound: 2023-24 Girls Report Week 2
By
Geoff Kimmerly
MHSAA.com senior editor
December 18, 2023
As holiday breaks bring some rest from school and work, Michigan girls basketball teams are smashing the pedal to the floor right into the new year.
In addition to 26 multi-day tournaments and one-day showcases, many contenders have lined up matchups with other championship hopefuls. Among those: Rockford, Frankenmuth and Goodrich all reached last season’s Semifinals or Finals and are playing two games over the next three weeks against opponents that also finished last season at the Breslin Center.
Picking just five matchups to highlight until our next report Jan. 8 was pretty much futile. But we’ve selected a few noted below, along with our regular reports on teams that caught our attention over the last week.
“Breslin Bound” is powered by MI Student Aid and based on results and schedules posted for each school at MHSAA.com.
Week in Review
The countdown of last week’s five most intriguing results:
1. West Bloomfield 67, Salem 27 In a rematch of a Division 1 Semifinal from last season, West Bloomfield opened in a big way as part of the Kensington Lakes Activities Association/Oakland Activities Association Challenge.
2. Grass Lake 50, Tecumseh 40 The Division 3 Warriors (4-1) avenged last season’s 78-49 loss to Division 2 Tecumseh (2-2).
3. Detroit Edison 62, Detroit Country Day 53 These two Division 2 contenders met at the Best of Michigan Holiday Classic, with Edison moving to 2-0 by handing Country Day (4-1) its only defeat.
4. Sault Ste. Marie 50, St. Ignace 34 This Straits Area Conference matchup is arguably the best in the Upper Peninsula, and the reigning league champion Blue Devils (3-1) ran their winning streak over the Saints (3-1) to three.
5. Williamston 45, Haslett 43 Last season’s Capital Area Activities Conference Red runner-up Hornets (2-2) earned an early edge on reigning champion Haslett (2-3), which has three defeats by a combined nine points after going 22-2 last winter.
Watch List
With an eye toward March, here are two teams in each division making sparks:
DIVISION 1
Grand Rapids Kenowa Hills (4-0) Kenowa Hills jumped from 10-12 in 2021-22 to 16-9 last season, and is continuing to build. A 50-48 win over Kent City on Dec. 8 was an immediate attention grabber, and that had followed a 15-point win over Grandville Calvin Christian after the Knights had fallen to Calvin by 12 last winter.
Macomb Dakota (4-0) The Cougars have won all of their games by double digits, with their last two victories also the lone losses this season for Utica Ford and Dearborn. Dakota lost to Ford by 18 and six points last season on the way to finishing 14-11 overall.
DIVISION 2
Alma (4-0) The Panthers broke a string of three sub-.500 seasons in going 13-10 last winter and gave a hint of what they could do with a late two-point win over Saginaw Swan Valley after losing to the Vikings by 30 a month earlier. This season’s start has included a 10-point win over Swan Valley, and last week Alma handed the only losses so far to Gaylord and Bay City John Glenn.
Livonia Clarenceville (4-0) The Trojans have won a combined 29 games over the last two seasons, finishing third two years ago and tying for second last winter in the Michigan Independent Athletic Conference Red. After three double-digit wins to start this season’s campaign, Clarenceville may have earned its most notable in downing Bloomfield Hills Cranbrook Kingswood 39-37 on Friday – the Cranes’ lone loss.
DIVISION 3
Elk Rapids (4-0) The Elks entered this winter a combined 55-9 over the last three seasons including 21-4 a season ago. Opening with wins over a pair of Big North Conference opponents, Petoskey and Alpena, was solid, but perhaps bested last week with a 49-39 win over reigning Division 4 champion Maple City Glen Lake and 32-22 victory over Traverse City St. Francis – which also won 21 games last season and finished one ahead of Elk Rapids to take the Lake Michigan Conference title.
Ovid-Elsie (5-0) The Marauders ran their Mid-Michigan Activities Conference winning streak to 34 games with Friday’s 53-46 victory over New Lothrop, having claimed the last two league titles and also topping 20 wins overall the last two winters. Ovid-Elsie’s wins over the Hornets and Otisville LakeVille Memorial this season remain those teams’ only defeats.
DIVISION 4
Alcona (4-0) The Tigers bounced back from a 2-3 start last season to finish 15-7 and share the North Star League Big Dipper title with Oscoda and Rogers City, and they’ve already avenged two of those early losses with wins the last two weeks over Hillman and Posen. Alcona also handed Tawas its only defeat so far, 44-33 on Friday.
Ishpeming (3-0) Thursday’s 54-28 win over Calumet was Ishpeming’s first over the Copper Kings since December 2018 and came after the Hematites extended their winning streak over rival Westwood to four going back two seasons. Both are indicative of the team’s improvement from 5-10 to 12-9 to 16-7 last season.
Can’t-Miss Contests
Be on the lookout for results of these games coming up:
Thursday – Frankenmuth (3-0) at Rockford (3-0) – The reigning Division 2 runner-up Eagles will follow up a Tuesday rematch with Goodrich from last season’s Semifinals by hitting the road to face the reigning Division 1 champion.
Friday – Grass Lake (4-1) at Saline (4-0) – Saline finished 21-4 last season, and one of those losses was 48-38 to the Warriors.
Friday – Lansing Catholic (2-1) at Ann Arbor Father Gabriel Richard (4-0) – FGR has some notable wins already this winter, and downing the reigning Division 2 champion Cougars would be the Irish’s best achievement yet.
Dec. 27 – Grand Rapids West Catholic (2-0) vs. Rockford (3-0) at Cornerstone University – West Catholic’s 61-54 win over Rockford at last season’s Cornerstone Holiday Tournament was the Rams’ lone defeat of the season.
Dec. 29 – Hemlock (4-0) vs. Goodrich (4-0) at Romulus – This matchup of last season’s Division 3 champion Huskies and the Division 2 semifinalist Martians is the headliner from the Michigan Hardwood Classic.
MHSAA.com's weekly “Breslin Bound” previews and reviews are powered by MI Student Aid, a division within the Department of Lifelong Education, Advancement, and Potential (MiLEAP). MI Student Aid encourages students to pursue postsecondary education by providing access to student financial resources and information. MI Student Aid administers the state’s scholarship and grant programs that help make college Accessible, Affordable and Attainable for you. Connect with MI Student Aid at www.michigan.gov/mistudentaid and find more information on Facebook and Twitter @mistudentaid.
PHOTOS (Top) St. Louis' 4-1 start has included last week's 48-30 win over Lakeview. (Middle) Davison opens last week with a 36-28 win over North Branch. (Top photo by High School Sports Scene; middle photo by Terry Lyons.)