![](/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.
![Detroit Country Day basketball](/sites/default/files/2022-03/220316_D2_2H.jpg)
D2 Preview: Past Powers, New Hopefuls Bring Stories to Breslin
By
Geoff Kimmerly
MHSAA.com senior editor
March 16, 2022
This weekend’s Division 2 Finals bracket might have the most pre-packaged storylines of any of the four divisions that will celebrate girls champions this weekend at Breslin Center.
Detroit Edison returns after the last two seasons were cut short, seeking to add a fourth title in six years with another Miss Basketball leading the way. Detroit Country Day owns the most Finals championships in girls basketball history and is seeking its first since 2018.
Grand Rapids West Catholic hopes to follow the Miss Basketball runner-up to its first championship in more than three decades. And Ludington, making its first appearance at Finals weekend, is looking to add more firsts to a historic run.
DIVISON 2 Semifinals – Friday
Grand Rapids West Catholic (24-1) vs. Detroit Country Day (14-7), 5:30 p.m.
Detroit Edison (17-3) vs. Ludington (20-5), 7:30 p.m.
FINAL – Saturday – 6:15 p.m.
Tickets for this weekend’s games are $12 for both Semifinals and Finals and are available via the Breslin Center ticket office. All Semifinals will be broadcast and viewable with subscription to MHSAA.tv, and all four Finals will air live Saturday on Bally Sports Detroit’s primary channel as well as on the BSD website and app. Audio broadcasts of all Semifinals and Finals will be available free of charge from the MHSAA Network.
Here’s a look at the four Division 2 semifinals (with rankings by MPR and statistics through Regional Finals):
DETROIT COUNTRY DAY
Record/rank: 13-7, No. 28
League finish: Does not play in a league.
Coach: Jerica Williams, second season (28-10)
Championship history: Thirteen MHSAA titles (most recent 2018), four runner-up finishes.
Best wins: 59-55 over Marysville in Quarterfinal, 54-39 over St. Clair Shores Lakeview, 47-45 over Division 4 No. 11 Allen Park Inter-City Baptist.
Players to watch: Jaidyn Elam, soph F (13.6 ppg, 6.8 rpg, 3.2 spg); Emma Arico, soph. G (8.9 ppg, 3.4 apg); Ari’Yana Wiggins, fr. F (9.7 ppg, 5.9 rpg).
Outlook: Four starters are back from the team that made last season’s Semifinals, with Elam and Arico joined by junior guard Aysia Yokely (8.6 ppg) and sophomore forward Peja Liles (4.8 ppg, 5.4 rpg). The Yellowjackets have all of that experience and still no seniors, with Elam also having made the all-state second team last season and Arico earning an honorable mention. Country Day saw its share of tough opponents, with six of its seven losses coming against teams that ended up with 14 or more wins.
DETROIT EDISON
Record/rank: 17-3, No. 1
League finish: Does not play in a league.
Coach: Monique Brown, 10th season (177-40)
Championship history: Three MHSAA titles (most recent 2019).
Best wins: 53-35 over No. 3 Portland in Quarterfinal, 85-43 over No. 2 Redford Westfield Prep, 67-44 over Division 1 No. 3 Farmington Hills Mercy, 60-32 over Division 1 No. 13 Bloomfield Hills Marian, 60-47 over Division 1 No. 11 Parma Western, 68-30 over Division 1 No. 14 East Lansing, 67-48 over Division 1 No. 1 Hudsonville, 60-52 over Division 3 No. 1 Ypsilanti Arbor Prep.
Players to watch: Ruby Whitehorn, 6-0 sr. G (23.9 ppg, 12.1 rpg, 3.9 apg, 4.5 spg, 2.1 bpg); NaKiya Bonner, 5-6 soph. G (8.2 ppg, 5.5 apg); Madisen Wardell, 6-1 sr. F (13.5 ppg, 6.1 rpg).
Outlook: After last season’s undefeated team was sidelined during Districts by COVID-19, Edison is back looking to add to its three straight Finals championships won from 2017-19. Whitehorn, who has signed with Clemson, gave her program its fourth-straight Miss Basketball Award winner earlier this week, and Wardell will continue her career at DePaul. Edison’s only losses were to Division 1 semifinalist West Bloomfield, Indiana state champion South Bend Washington and Illinois power Joliet West. All but one of the Pioneers’ in-state opponents finished with a winning record this winter.
GRAND RAPIDS WEST CATHOLIC
Record/rank: 24-1, No. 8
League finish: First in Ottawa-Kent Conference Blue
Coach: Jill VanderEnde, eighth season (119-69)
Championship history: Two MHSAA titles (most recent 1990), one runner-up finish.
Best wins: 82-27 over No. 6 Edwardsburg in Quarterfinal, 55-29 over No. 20 Newaygo in Regional Final, 55-43 over Grand Rapids Christian in Regional Semifinal, 64-29 over Grand Rapids Catholic Central in District Final, 63-23 over No. 13 Sparta.
Players to watch: Abbey Kimball, 5-10 sr. G (25.1 ppg, 97 3-pointers, 3.0 apg, 4.4 spg); Cadence Dykstra, 5-9 jr. G (8.2 ppg, 4.5 apg); Elisha Dykstra, 5-10 fr. F (8.3 ppg).
Outlook: West Catholic is returning to the Semifinals for the first time since 1995, when it finished Class B runner-up. Kimball was the Miss Basketball runner-up and added three more 3-pointers Tuesday – the Michigan State signee’s 100 are tied for second-most in a single season in MHSAA history and five off the record. Freshman guard Anna Ignatoski adds 7.8 points off the bench and was the team’s leading scorer in the Quarterfinal win over the Eddies. The team’s only loss was Dec. 23 to Division 1 semifinalist Rockford.
LUDINGTON
Record/rank: 20-5, No. 45
League finish: Tied for first in the Lakes 8 Activities Conference.
Coach: Warren Stowe, second season (34-10)
Championship history: Has never played in an MHSAA Final.
Best wins: 30-27 over No. 5 Frankenmuth in Quarterfinal, 34-31 over Negaunee in Regional Final, 54-36 over Standish-Sterling in Regional Semifinal, 38-33 over Muskegon Western Michigan Christian.
Players to watch: Keelyn Laird, 6-3 jr. F (10.7 ppg, 7.4 rpg, 3.2 apg); RyAnn Rohrer, 5-10 sr. F (10.7 ppg, 7.9 rpg, 3.2 apg, 3.3 spg); Abi Bandstra, 5-9 sr. G (4.5 ppg, 2.8 spg).
Outlook: Ludington will be playing in its first Semifinal since 2004 and has won 17 of its last 18 games. The Orioles avenged an early defeat to league rival WMC and also got good early prep in losses to eventual Division 1 semifinalists Hartland and West Bloomfield, and Muskegon Reeths-Puffer. Only one opponent has put up more than 40 points during the 18-game run – Cadillac, which scored 47 in handing Ludington the lone loss over that stretch. Junior forward Olivia Lynn adds 7.5 points off the bench.
PHOTO Detroit Country Day’s Jaidyn Elam brings the ball upcourt during last week’s Regional Semifinal win over Livonia Clarenceville. (Photo by Douglas Bargerstock.)