![](/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.
![West Bloomfield Girls Basketball](/sites/default/files/2022-04/220414_wbgbb_2H.png)
Team of the Month: West Bloomfield Girls Basketball
By
Geoff Kimmerly
MHSAA.com senior editor
April 14, 2022
One of the compelling moments of this season’s Girls Basketball Finals at Michigan State’s Breslin Center came just after the final buzzer of the Division 1 championship game.
As his players rushed each other to celebrate midcourt, West Bloomfield coach Darrin McAllister first leaned forward, hands just above his knees, before moving down into a crouch, head dipped to his chest, obviously breaking down a bit in joy at what his Lakers had just completed.
McCallister had played college football and helped Wayne State’s women’s basketball program to multiple NCAA Sweet 16 appearances as an assistant coach. But what the Lakers did last month – finish reeling off 25 straight wins with their first MHSAA Finals girls basketball championship – made his “Mount Rushmore,” if not much more.
“This is probably at the top,” he said this week, after a month of the experience settling in. “Because I knew the sacrifices that these players made, I knew the sacrifices that the coaches and the parents made, and then for (our players) to speak it into existence that they want to win a state championship, it’s great.”
It was not as easy as the Lakers – the MHSAA/Applebee’s “Team of the Month” for March – frequently made it appear.
Yes, West Bloomfield’s players said on their first day of practice Nov. 12 that they planned on winning the Division 1 championship. And that seemed like a logical goal for a team that eventually will send at least four players to Division I college programs and had won a league title and finished 10-3 during the COVID-interrupted 2020-21 season.
But the Lakers also entered the preseason having graduated five players from that team and with a young but talented lineup needing to learn how to be cohesive and efficient in their roles. Add in that McAllister got a late start, taking over the program after all of the summer training and majority of preseason prep were done.
West Bloomfield lost its season opener 59-46 to Dexter (which would go on to finish 19-3). But a week later, the Lakers started to show what they could do in coming back from a 19-point deficit to defeat Illinois power Bolingbrook 48-47.
Just before the midpoint of the regular season, McAllister could see things taking shape.
“We had talented players, but they were young. So we kinda started it all over and identified our identity,” he said. “Every had to establish their roles and buy into their roles, so it wasn’t easy. I think for me, it makes me more appreciative and makes me enjoy this experience more than anything else.”
Along the way, West Bloomfield repeated as Oakland Activities Association Red champion. Two weeks before the start of the playoffs, the Lakers also accomplished what for a few seasons had seemed unthinkable to most – hand Detroit Edison a 65-62 loss, the Pioneers’ first to an in-state opponent since 2017-18 and after Edison had defeated West Bloomfield by nine and 28 points the season before.
Perhaps the least surprised were the Lakers, who had started believing they could defeat Edison after the Bolingbrook win. They also believed they could compete with every other team as well – and they would continue impressing with a championship run that included wins over Bloomfield Hills Marian (15-7), Farmington Hills Mercy (18-5), Grosse Pointe North (18-6), Troy (13-12), Rockford (23-3) in the Semifinal and Hartland (25-2) in the championship game.
The pair of wins at Breslin showed what West Bloomfield has transformed into this winter. In defeating the Rams 66-63, the Lakers received double-digit scoring from four players – led by sophomore twins Indya Davis with 24 points and Summer Davis with 16 and six assists – with junior Sydney Hendrix posting a double-double of 10 points and 10 rebounds and guard Myonna Hooper setting the high-energy tone along with scoring 14 points. At the same time, senior center Zaneiya Batiste didn’t score and shot only twice – but grabbed nine rebounds, nearly the difference in the Lakers’ rebounding edge.
West Bloomfield defeated Hartland 51-42 with Indya Davis and Hendrix both posting double doubles, Summer Davis again dishing six assists, Hooper again energetically chipping in and Batiste again helping out big on the boards. In both games, sophomores Destiny Washington and Kendall Hendrix came off the bench to provide valuable minutes.
“March was the month everything came together,” McAllister said. “At the end of the (championship) game, I shed tears because it was emotional seeing it come together.”
West Bloomfield felt like it was just trying to catch up much of the season due to McAllister’s taking over late. But now, with five of this season’s top seven players coming back next year, it also feels like the Lakers are just getting started.
“Now I’m excited and looking forward to our offseason,” McCallister said. “I can’t wait to get the players in June and start getting workouts in and going to team camps, because I know that’s only going to make us better for the upcoming season.”
Past Teams of the Month, 2021-22
February: Cadillac girls skiing - Read
January: Hartland hockey - Read
December: Midland Dow girls basketball - Read
November: Reese girls volleyball - Read
October: Birmingham Groves boys tennis - Read