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.

Breslin Bound: 2024-25 Girls Report Week 10

By Geoff Kimmerly
MHSAA.com senior editor

February 10, 2025

We’re just three weeks away from the start of Girls Basketball Districts and two weeks from announcing this season’s brackets, and every day we get closer becomes a better one to start studying the Michigan Power Ratings (MPR) used to determine those pairings.

MI Student Aid

The MPR tables are searchable by Division, team and District number and update as results are entered. This season, for the first time, entire District brackets will be seeded – making every matchup, including those referred to below – important in deciding who will face who first when we get to March.

“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. Grand Rapids South Christian 58, Grand Rapids West Catholic 51 The Sailors (15-2) picked up a half-game lead in the Ottawa-Kent Conference Gold standings by avenging a 62-49 loss from Jan. 10 to West Catholic (14-2), which made the Division 2 Semifinals a year ago.

2. Pewamo-Westphalia 59, Fowler 53 The Pirates (16-0) are undefeated and took a two-game lead in the Central Michigan Athletic Conference, and they also remain the only team to defeat Fowler (13-2) this winter.

3. Ovid-Elsie 41, New Lothrop 39 (OT) The Marauders (15-2) also edged ahead by half a game in the Mid-Michigan Activities Conference by avenging a 46-37 loss to New Lothrop (14-2) from Dec. 20.

4. Grass Lake 58, Michigan Center 45 Grass Lake (14-3) needs one more win to clinch at least a share of the Cascades Conference East after finishing a regular-season sweep of the Cardinals (14-2), who are tied for second.

5. Niles Brandywine 45, Vicksburg 28 The reigning Division 3 runner-up Bobcats (16-0) continue to look ready for another tournament run after adding an impressive win over the Division 2 Bulldogs (14-2).

Watch List

With an eye toward March, here are two teams in each division making sparks:

DIVISION 1

Saginaw Heritage (14-3) The Hawks have climbed to No. 4 overall in Division 1 MPR with their combination of a tough schedule and plenty of success navigating it. They are tied for second and one game back of Midland in the Saginaw Valley League because of a Jan. 28 loss to the Chemics (14-1), and the other defeats came to Howell (12-5) and Frankenmuth (14-3) to go with wins over Sanford Meridian (12-2), Detroit Cass Tech (13-6), Freeland (12-3), Hemlock (14-3), Berkley (12-6) and last week Mount Pleasant (10-5). Wins over two more opponents could give Heritage especially sizable boosts – Flint Powers Catholic (12-3) on Friday and Kingston (12-1) in the regular-season finale Feb. 25.

Utica Eisenhower (16-1) After finishing 10-13 just a season ago, Eisenhower is potentially closing in on a Macomb Area Conference Red title with its only defeat this winter to reigning Division 2 champion Detroit Edison (12-3) on Jan. 4. Eisenhower handed rival Utica Ford (15-1) its only defeat, 64-49 on Jan. 28, and that result has the Eagles a game ahead in the Red with the rematch finishing the league schedule Feb. 21. Eisenhower also has nice wins over Fraser (11-6), New Baltimore Anchor Bay (14-3) and Rochester Hills Lutheran Northwest (11-4) and takes on Armada (13-1) three days before facing Ford again.

DIVISION 2

Parma Western (15-1) A District title to finish off last season’s 15-10 run may have provided momentum as Western has rolled this season. The Panthers opened with a 61-51 win over West Catholic, which as noted above made the Division 2 Semifinals last season, and on Jan. 23 dealt reigning Division 2 champion Edison a 53-48 defeat. Western leads in the Interstate 8 Athletic Conference by half a game with a rematch against second-place Coldwater (11-6) coming up Feb. 18, and the Panthers also have wins over Battle Creek Lakeview (11-5), Dexter (12-5), Marshall (11-4) and Williamston (10-6). That lone loss to Division 1 contender Belleville (16-1) gave Western another look at elite competition.

Wixom St. Catherine (14-2) The Stars have won 11 straight since finishing December with a pair of losses to Division 1 South Lyon (15-1) and Plymouth (12-6). St. Catherine has clinched the Catholic High School League AA title and is coming off a one-point win over Birmingham Seaholm (11-6). A pair of wins over Allen Park Cabrini (10-4) helped secure the league title, with others over Clarkston Everest Collegiate (12-2) and White Lake Lakeland (11-5) also highlighting the run. Two more opportunities to rise are coming up against Clawson (15-1) tonight and Dearborn Heights Crestwood (14-2) on Feb. 27.

Ishpeming's Mya Hemmer attempts to put up a shot while surrounded by Gladstone defenders during Gladstone’s 53-46 win on Feb. 4.

DIVISION 3

Hart (9-0) A 41-32 win over second-place Shelby (14-3) last week has Hart one win away from clinching a share of the West Michigan Conference Rivers championship and ran the Pirates’ league winning streak to 52 over the last five seasons. The only defeat this winter was 53-52 on Dec. 13 to Fremont (15-2), and that came just three days after a 37-34 win over Shelby in their first meeting. Hart bounced back from the defeat with a 46-42 win over Spring Lake (10-6), and the Pirates also have a win over Ravenna (10-6) with that rematch coming up Feb. 19. Hart also will travel to Muskegon Western Michigan Christian (8-2) on Saturday and host Morley Stanwood (11-4) on Feb. 25.

Kalamazoo Hackett Catholic Prep (14-2) A 2-2 start to this season has Hackett second in the Southwestern Athletic Conference Valley and needing help to catch leader Kalamazoo Christian for a share of the title. But Hackett has won 12 games straight, including rematches with Christian (13-3) and Schoolcraft to avenge those two defeats, and the Irish on Friday finished a regular-season sweep of Lawton (12-3). Hackett also has downed Onekama (12-4) and Galesburg-Augusta (10-6) during this run and can continue to build momentum for the postseason with nice matchups on the way against Centreville (10-3), South Haven (12-2) and Gobles (11-5).

DIVISION 4

Genesee Christian (12-2) The Soldiers have won 14 games both of the last two seasons and have a great path to surpass that total over the next few weeks after opening this impressive run with wins over Fenton (10-6) and Ovid-Elsie (15-2). Genesee Christian – playing as an independent this season – also owns victories over Saginaw Michigan Lutheran Seminary (12-3) and Pontiac Notre Dame Prep (11-4), with the losses to Flint Hamady (12-1) and Adrian Lenawee Christian (11-6). Matchups with Division 2 Corunna (10-6) and Linden (10-4) should provide more prep for the District, where the Soldiers could run into Everest again after falling to the Mountaineers to close the last two winters.

L'Anse (13-2) Despite a tough 52-49 overtime loss to Baraga on Jan. 30, L’Anse still controls some of its destiny in the Copper Mountain Conference with Lake Linden-Hubbell (12-4) and league leader Ewen-Trout Creek (15-1) coming up this week. It’s a great spot to be in as the Purple Hornets are coming off back-to-back sub-.500 seasons but have 12 wins this season by at least 15 points to go with a one-point victory over Calumet (10-5). L’Anse also has downed Baraga (12-4) in nonleague play and Felch North Dickinson (10-5), with the other loss to Division 2 Houghton (12-4). A second matchup with Lake Linden-Hubbell and meeting with Hancock (10-4) highlight the final weeks of the regular season.

Can’t-Miss Contests

Be on the lookout for results of these games coming up: 

Monday – St. Charles (12-3) at Mount Pleasant Sacred Heart (12-0) – Sacred Heart is undefeated in Mid-State Activities Conference play and St. Charles has one loss, from their Jan. 24 meeting won by the Irish 49-40.

Monday – Yale (15-1) at Sandusky (14-0) – Yale leads the Blue Water Area Conference and Sandusky tops the Big Thumb Conference Black.

Tuesday – Flint Powers Catholic (12-3) at Midland (14-1) – The Chemics lead the Saginaw Valley League by a game ahead of Powers and Heritage, with four league games remaining for all three and Powers at Heritage on Friday.

Friday – Wayne Memorial (12-5) at Belleville (16-1) – Wayne’s 57-52 win over Belleville on Feb. 1 had statewide impact, and the rematch will get plenty of attention as well as likely determine the champion(s) of the Kensington Lakes Activities Association East.

Sunday – Detroit Public School League Tournament Final at Wayne State – Four teams remain in pursuit: Renaissance (17-1), Martin Luther King (9-8), Cass Tech (13-6) and Mumford (8-4).

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) Lansing Christian’s Sophia Carrillo reaches to collect a loose ball during her team’s 43-37 double overtime over Bath on Feb. 5. (Middle) Ishpeming's Mya Hemmer attempts to put up a shot while surrounded by Gladstone defenders during Gladstone’s 53-46 win on Feb. 4. (Lansing Christian/Bath photo by Click by Christine McCallister. Ishpeming/Gladstone photo by Cara Kamps.)