![](/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.
![Davison and Flushing tip off last week; the Raiders won the season opener 50-41.](/sites/default/files/2022-12/221205_basketball_2H.png)
Breslin Bound: 2022-23 Girls Report Week 1
By
Geoff Kimmerly
MHSAA.com senior editor
December 5, 2022
Another girls basketball season began last week – and took off in a hurry for several teams anticipating great things this winter.
Two themes generally dominate the start of a hoops season – contenders facing off in intriguing nonleague matchups, and teams that didn’t enjoy the greatest success last winter eclipsing it quickly this time around. We have plenty to tell of both as we begin another series of “Breslin Bound” reports.
“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 West Catholic 55, Hudsonville 50 – Last season’s Division 2 runner-up opened with this win over the 2020 Division 1 champion Eagles, who are coming off a 21-3 finish from a year ago.
2. Lowell 66, Kent City 39 – The Red Arrows handed Kent City – a Division 3 semifinalist last season – its first regular-season defeat since Jan. 14, 2020.
3. Hart 43, Ludington 42 – The Pirates opened the season by edging the Orioles, who are coming off a Division 2 Semifinals appearance in March.
4. Grosse Pointe North 56, Detroit Country Day 45 – The Norsemen capped the season’s first week with a double-digit win over the Yellowjackets, who have made the Division 2 Semifinals two straight seasons.
5. Lake Fenton 46, Frankenmuth 36 – Lake Fenton, a Division 2 Regional finalist last season, opened with this win over one of last season’s quarterfinalists.
Watch List
With an eye toward March, here are two teams in each division making sparks:
DIVISION 1
Flint Carman-Ainsworth (2-0) Despite starting 0-2 last season, Carman-Ainsworth rebounded to finish 18-5 and win a District title. Those early defeats came to Williamston by three and Brighton by 19, and those teams both went on to win 17 games. Last week, Carman-Ainsworth opened with a 61-50 win over Williamston and then defeated Brighton 59-43.
Taylor (3-0) The Griffins closed 5-2 over their final seven games last winter to get to 11-11 for the season, and they’re well ahead of that pace with three first-week wins – including a 38-33 victory over Dearborn Heights Crestwood, which is coming off a 12-7 finish. This week should be telling as Taylor faces Gibraltar Carlson and Allen Park after going a combined 1-3 against them last season.
DIVISION 2
Ann Arbor Father Gabriel Richard (3-0) The Irish also opened with three first-week wins, the exclamation mark coming with a 73-50 victory over Redford Westfield Prep at Saturday’s Arbor Prep Ice Breaker Invitational – Westfield was 21-2 last season. Gabriel Richard is coming off a 15-7 run last winter and also last week defeated reigning Division 4 runner-up Plymouth Christian Academy 61-44.
Kingsford (2-0) A 5-5 start last season turned into a 7-13 finish, but Kingsford looks to be on stronger footing early with wins last week over Felch North Dickinson 48-37 and Ishpeming Westwood 42-38. Those two handed the Flivvers losses of six and 29, respectively, to start last winter. Kingsford is seeking its first winning season since 2018-19.
DIVISION 3
Dansville (2-0) The Aggies are coming off a solid 17-8 season, especially considering they play in a league with statewide powers Portland St. Patrick, Fowler and Pewamo-Westphalia among others. Dansville lost to the two-time reigning Division 4 champion Eagles by six and 27 last season, but finished last week by handing them a 36-22 defeat.
Gwinn (2-0) The Modeltowners didn’t win a game last season until Feb. 9, and that was their lone victory. Their 19 losses included a pair to Gladstone, and Gwinn avenged those with a 41-38 win Tuesday – and then doubled last year’s win total with a 41-31 victory over Brimley on Saturday.
DIVISION 4
Manistee Catholic Central (2-0) The Sabers opened with double-digit wins over Big Rapids Crossroads Academy and Kalamazoo Hackett Catholic Prep, the latter after losing 43-30 last season as Hackett went on to finish 13-9. MCC continued to finish 14-6 and share the West Michigan D League title, and will see the first of the other two co-champions, Mesick, for the first time Friday.
Morenci (2-0) The Bulldogs generally see Adrian Lenawee Christian once during the regular season and then frequently a second time during the MHSAA Tournament. Last week’s 47-39 win over Lenawee Christian was Morenci’s first since Dec. 4, 2015, and the Bulldogs also defeated Addison 49-17 to avenge an opening-night loss from last year.
Can’t-Miss Contests
Be on the lookout for results of these games coming up:
Monday – Bloomfield Hills Marian (1-1) at Imlay City (2-0) – The Spartans were 19-4 last season and loaded up a strong nonleague opponent for an early test.
Tuesday – Clarkston (2-0) at Macomb Dakota (1-0) – Both are coming off 17-win seasons and will play (other opponents) in the weekend’s Best of Michigan Holiday Classic.
Friday – Fowler (1-1) at Portland St. Patrick (1-1) – Fowler may have won last season’s Division 4 championship thanks in part to a District Final win over the Shamrocks, but St. Pat won both regular-season meetings and the league title.
Friday – Detroit Edison (1-0) vs. Bolingbrook, Ill. (8-0) – The reigning Division 2 champion Pioneers start a weekend facing Illinois powerhouses with Bolingbrook at Belleville, then take on Chicago Whitney Young on Saturday.
Saturday – Detroit Country Day (1-1) at Belleville (0-0) – The most intriguing matchup of instate opponents at the Best of Michigan Holiday Classic pits the host Tigers – who have upped their win total three straight seasons – against a Country Day team with high aspirations.
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 Davison and Flushing tip off last week; the Raiders won their season opener 50-41. (Photo by Terry Lyons.)