![](/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.
![Marquette's Cora Anderson (32) is surrounded by Charlevoix's Abby Wright (5), Bayani Collins (21) and Karlee Easton (13) as she heads to the basket during Marquette’s 42-28 win Dec. 29.](/sites/default/files/2023-01/230109_gbb_2H.png)
Breslin Bound: 2022-23 Girls Report Post-Break
By
Geoff Kimmerly
MHSAA.com senior editor
January 9, 2023
School’s back in session, snow has mostly stayed away as of late, and basketball barely took a breather during another holiday break that saw several of the state’s best girls teams test themselves in preparation for the grind to come over the next two months.
Our post-break report below highlights some of the most intriguing action over the last three weeks – including a new record holder for career coaching wins – and previews games to keep an eye on this week as we get rolling into calendar year 2023.
“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. Chelsea 59, Ypsilanti Arbor Prep 50 (OT) Just as most schools were getting out or preparing to do so Dec. 21, Chelsea (8-1) handed Arbor Prep (5-2) its first in-state loss since Feb. 18.
2. Sandusky 42, Unionville-Sebewaing 28 Sandusky improved to 8-2 as coach Al DeMott became the all-time winningest in MHSAA girls basketball history with 798 victories.
3. West Bloomfield 86, Chicago Kenwood Academy (Ill.) The Lakers (7-2) held on in overtime at the Motor City Roundball Classic against a top team from Illinois.
4. Northville 42, Traverse City Central 22 The Mustangs (8-1) highlighted their holiday showcase by handing the Trojans (7-1) their only loss this season.
5. Lowell 54, Redford Westfield Prep 50 The Red Arrows are 8-0 with a pair of four-point wins mixed in, including this one on Westfield Prep’s home court during the Motor City.
Watch List
With an eye toward March, here are two teams in each division making sparks:
DIVISION 1
Detroit Renaissance (7-0) The Phoenix already have piled up notable wins under first-year coach Dashaun Wood, including 41-39 over Wayne Memorial early and more recently 66-54 over Detroit Country Day and 67-46 over East Kentwood. The Phoenix’s remaining schedule includes more intriguing nonleague matchups against Grand Blanc, Muskegon and East Grand Rapids plus a league meeting with Detroit Cass Tech.
Rockford (7-1) After reaching the Division 1 Semifinals and falling by just three points to eventual champion West Bloomfield last season, Rockford is off and running with its only loss to reigning Division 2 runner-up Grand Rapids West Catholic. The Rams opened this winter by handing Ada Forest Hills Eastern what remains its lone loss, and Rockford also has solid victories over Holland Christian, Byron Center and Detroit Country Day.
DIVISION 2
Frankenmuth (6-1) Only an opening-night loss to Lake Fenton (see below) has kept the Eagles from a perfect start, and wins over Grand Blanc and Imlay City have highlighted the ensuing run. Frankenmuth also kicked off Tri-Valley Conference 8 play Friday with a key 42-39 victory over Saginaw Swan Valley, which tied with Freeland for second behind the Eagles last season. The first Freeland matchup is this Friday.
Lake Fenton (8-0) Beginning with the 46-36 season-opening win over Frankenmuth, Lake Fenton has rolled to eight double-digit victories including also handing the only loss so far to Grosse Pointe North, 51-33 – and after GPN was one of just four teams to defeat Lake Fenton a year ago. Wins over Detroit Public School League contenders Mumford and Cass Tech also are impressive, and the Blue Devils can make another massive statement tonight hosting Arbor Prep.
DIVISION 3
Evart (8-1) The Wildcats also are undefeated since a season-opening loss, to Sanford Meridian, with the best wins 61-44 over McBain and 42-40 over Lake City after losing to them a combined five times last season including to McBain in their District Final. Evart is pacing the Highland Conference after finishing fourth a year ago, with its first matchup Wednesday against McBain Northern Michigan Christian – the only other team to defeat the Wildcats in 2021-22.
Sanford Meridian (8-1) The Mustangs are early co-leaders in the Jack Pine Conference, with a first matchup against the other first-place team Farwell coming up Friday. The early work has been exceptional; following the 60-52 win over Evart, Meridian took all of their next five games by at least 39 points and earned a rare win over Freeland 46-40. The only loss was 40-38 in overtime to Marysville at the SC4 Holiday Showcase.
DIVISION 4
Baraga (7-1) After reaching the Division 4 Semifinals last season, Baraga has been flawless aside from Friday’s 66-52 loss to highly-regarded Division 2 Houghton. The Vikings escaped their season opener against Ontonagon 42-38, but hadn’t won by fewer than 21 points since until that first defeat. That 21-point win was over Lake Linden-Hubbell, another Copper Mountain Conference team otherwise making some early noise in Division 4. Baraga hosts one-loss Calumet on Tuesday.
Mackinaw City (8-0) It’s even better than business as usual for the Comets, who are coming off an 18-4 season and already this winter have avenged two of those losses in downing Indian River Inland Lakes by 19 and Pickford by 32. The Inland Lakes win clinched Mackinaw City’s Christmas Tournament title, and the Comets also won an impressive early showdown with Cedarville and finished last week by handing the second defeat this winter to Burt Lake Northern Michigan Christian.
Can’t-Miss Contests
Be on the lookout for results of these games coming up:
Monday – Ypsilanti Arbor Prep (5-2) at Lake Fenton (8-0) – Arbor Prep is No. 1 in Division 3 Michigan Power Rating (MPR) among teams with at least six games played, while Lake Fenton is No. 3 in Division 2.
Tuesday – Hudsonville (6-2) at Holland West Ottawa (9-0) – West Ottawa won its first 10 games last season before ending 15-8 after rolling through the tough Ottawa-Kent Conference Red. Reigning league champion Hudsonville may give the Panthers their best test yet.
Tuesday – Jackson Northwest (7-1) at Coldwater (8-0) – Coming off a 34-29 win over reigning Interstate 8 Athletic Conference champion Parma Western, Coldwater takes on another annual contender while enjoying its most impressive run since 2018-19.
Thursday – Maple City Glen Lake (5-0) at Traverse City Central (7-1) – This could be a major statement win for either, as Glen Lake made the Division 3 Semifinals last season and Central lost 49-28 in their regular-season matchup.
Friday – Hancock (8-0) at Escanaba (8-0) – The Eskymos have tough Great Northern Conference matchups Tuesday and Thursday but then end the week with a meeting of undefeated opponents. Escanaba defeated the Bulldogs 58-53 last season.
MHSAA.com's weekly “Breslin Bound” previews and reviews are powered by MI Student Aid, a part of the Office of Postsecondary Financial Planning located within the Michigan Department of Treasury. 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 529 college savings programs (MET/MESP), as well as 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.
PHOTO Marquette's Cora Anderson (32) is surrounded by Charlevoix's Abby Wright (5), Bayani Collins (21) and Karlee Easton (13) as she heads to the basket during Marquette’s 42-28 win Dec. 29. (Photo by Cara Kamps.)