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.
Goodrich Finishes Winter Season with Perfection, Completing Undefeated Title Run
By
Paul Costanzo
Special for MHSAA.com
March 21, 2026
EAST LANSING – Kayla Hairston approached the Division 2 bracket poster with two hands on the Goodrich nameplate, getting it positioned on the final line in the only way she and her teammates knew how to do things – perfectly.
The Martians defeated Tecumseh 55-44 on Saturday in the night’s concluding Girls Basketball Final at the Breslin Center, finishing off a 29-0 season.
“Playing Tecumseh, the team that knocked us out last year, and beating them for the state championship felt amazing,” Hairston said. “We came to Breslin and we emphasized that we don’t want to be at Breslin, we want to be here for a state championship, and that mindset is what got us here.”
It was the third title for the Goodrich girls team, and first since the program won back-to-back Class B titles in 2012 and 2013. The Martians’ victory also prevented Tecumseh from repeating as the Division 2 champ.
“It’s definitely special,” Goodrich senior Tanner Schramm said. “Coming out and getting this win today against Tecumseh is big, because we lost to them last year thinking we could win it all last year. Coming out and winning today feels even better.”
Hairston finished with 21 points in her final game at Goodrich, while Baylor Lauinger had 14 and Schramm had eight. Lauinger added five rebounds and four steals, both team highs.
Avery Zajac led Tecumseh with 19 points, while Addi Zajac had 10 points and eight rebounds.
Everything was difficult for Tecumseh, however, as it was held to its third-lowest scoring output of the season.
“I thought our kids were just awesome today,” Goodrich coach Jason Gray said. “Tecumseh’s a very good team, and we thought there were certain things that they had advantages on, and certain things that we had advantages on, and we really kind of leaned on our advantages tonight. All year, our defensive pressure has been a key. We don’t always trap and run all over the floor like that, but we do press to the ball. Tonight was probably one of the best (games) we played all year long.”
Goodrich’s unrelenting defense had Tecumseh sped up throughout the first half, as the returning champ had as many turnovers as points through 16 minutes and trailed 29-14 at the break.
Three Martians – Kat Federick, Baylor Lauinger and Kaylee Eickhoff – had three steals apiece by halftime, and the team had scored 22 points off turnovers.
All of that success came despite star senior Schramm being saddled with foul trouble and spending a majority of the half on the bench.
“We really couldn’t run anything,” Tecumseh coach Kristy Zajac said. “We were really trying to pound it into the post to Addi, and our guards were getting pressured so much, and we kept turning the ball over. You can’t turn the ball over in big games like this. That kind of made our offense struggle all together.”
Tecumseh (26-3) settled down in the second half, but the hole was too deep. Even when it did get the game back to a 10-point deficit in the final seconds of the third, Schramm hit a 3-pointer at the buzzer to extend the lead and wipe away any Tecumseh momentum heading into the fourth.
“That was tough,” Kristy Zajac said. “We were working our way back little by little, then they hit that 3, and that was the dagger. This crew never gives up. I told them in the timeout that we were down to Chelsea by 11 with a minute to go and we came back and won that game – they fight and they fight, and they battle and battle until the last buzzer sounds, and I thought they did that tonight. They just made more shots than we did and played a little bit better.”
Schramm’s shot came off a set play for the Martians, even though Gray didn’t have to call a timeout or even signal to Hairston and Schramm to run it.
“Kayla knew exactly where she was going to go: She was either going to get a layup or she was kicking it to Tanner,” Gray said. “Tanner knew that ball was coming, and Tanner knew that shot was coming. It really gives the kids a lot of confidence when they know they’re supposed to be taking the shot and they’re not questioning it. That 3 was huge, but it was by design. Our kids were ready for that moment.”
From there, Hairston and the Martians left no doubt. The senior scored eight points over the quarter’s first 1½ minutes as Goodrich built a 19-point lead and put the game away.
“It feels great, but I give it all to my teammates,” Hairston said. “I’ve been struggling a little bit with my 3-point shot, so them just having my back and telling me that’s my shot and not to give up on myself, even though I’ve been missing, it just means a lot. For them to set me up and get me those open shots, it means a lot.”
PHOTOS (Top) Goodrich’s Kayla Hairston (12) drives to the basket as Tecumseh’s Addi Zajac (40) goes for a block during Saturday’s Division 2 Final at Breslin Center. (Middle) Goodrich’s Kaylee Eickhoff (10) makes a move on the baseline with Avery Zajac defending. (Photos by Keionna Banks and Lilanie Karunanayake/Hockey Weekly Action Photos.)