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.
2005 Miss Basketball DeHaan Cherishing Newest Title: 1st-Time Mom
By
Dean Holzwarth
Special for MHSAA.com
July 25, 2022
JENISON – Allyssa DeHaan-Clark remains one of the greatest shot blockers in national high school and college basketball history.
Recently, the former Grandville High School and Michigan State University standout became a mother for the first time.
DeHaan-Clark, and her husband Aaron, adopted a baby girl last September.
Bradley Noelle Clark was born on Sept. 29, 2021, at 36 weeks.
When the Clarks found out about the impending delivery, they drove straight to the hospital from their vacation in Tennessee to meet her. They took her home a few days later.
“Parenthood is awesome, hard, wonderful and beautiful,” DeHaan-Clark said. “She’s 9½ months old, and she just lost her first tooth and is starting to crawl. She says, ‘Da, Da’ a lot, even though I’m with her most of the time during the day.”
DeHaan-Clark, who turned 34 last month, married in 2012. She and her husband had aspirations to raise a family.
Unfortunately, the road to parenthood was more difficult than they envisioned.
“We tried to get pregnant for six years,” DeHaan-Clark said. “We went through a lot of testing and different fertility procedures, but nothing took. We never had one positive pregnancy test.”
Although disappointed and frustrated, the Clarks pursued another avenue.
“Adoption was always in the back of our mind, and it came to a point where I didn’t know what to do,” DeHaan-Clark said. “One night we prayed to God for clarity and wisdom and just some direction. He answered that prayer the next morning with a text message, and that put us on a fast track to adoption.”
The Clarks went through the application process last June. Four months later, Bradley was born. She officially became a Clark in May.
“It was awesome for God to answer that prayer so quickly,” DeHaan-Clark said. “After six years of struggle, she was meant to be in our family. We love her so much and adore her to pieces.
“She’s loved by so many, and we are very thankful that the birth family chose us. After all that pain and suffering, God made something beautiful through that.”
DeHaan-Clark was a four-year towering presence at Grandville. As a junior in 2004, she set the MHSAA record for blocks in a single season with 236 and averaged nearly a triple-double (27 points, 13 rebounds and 9.5 blocks per game).
As a senior, she helped lead the Bulldogs to a 25-2 record and their first Class A Semifinal appearance. She was named the 2005 Miss Basketball Award winner by the Basketball Coaches Association of Michigan.
DeHaan-Clark grew six inches during middle school and entered her high school freshman year at 6-foot-6. She was 6-9 as a senior before taking her talents to East Lansing.
“Middle school was tough for everyone, but it was extremely tough for me,” DeHaan-Clark said. “I was entering a new school system, and I had just started playing basketball a year or two before that and had a huge growth spurt. Learning how to be coordinated and play the game took a while.”
DeHaan-Clark was a part of three consecutive Ottawa-Kent Conference Red championship teams. The Bulldogs won District and Regional titles in 2005 before defeating previously-unbeaten Benton Harbor in a Class A Quarterfinal. Grandville’s run ended with an overtime loss to Southfield-Lathrup in the Semifinal at Breslin Center.
“My senior year was the best,” DeHaan-Clark said. “It was so much fun with the championships and all the wins. Playing with the same girls for four years and then finally having a successful team was amazing.”
DeHaan-Clark made the MHSAA’s single-season scoring list as a senior with 710 points, having averaged 26.3 per game that fall. She also finished with 718 career blocks, setting an MHSAA record later broken by Kalamazoo Central’s Asia Robeson (723) in 2014. Still, DeHaan-Clark remains seventh all-time nationally for career blocks, with Robeson sixth on the list.
DeHaan-Clark arrived at Michigan State with high aspirations.
“I had big goals of playing in the Olympics and playing professionally, but obviously those didn’t come to fruition,” she said. “I learned to dream big, so I set big goals from the beginning.”
DeHaan-Clark emerged as a dominating shot blocker for the Spartans, and was Big Ten Freshman of the Year in 2006-07 as she set the conference record with 145 blocks.
As a sophomore she re-established the Big Ten record for single-season blocks with 150. She was named Big Ten Defensive Player of the Year as a senior in 2009-10.
She ended her career as Michigan State’s all-time blocks leader with 503 – with that total also second in Division I history at that time and now third on the NCAA DI list – to go with career averages of 12.1 points and 6.8 rebounds per game.
“It was a big transition from high school to college, but I wanted to be a contributor,” DeHaan-Clark said. “I had amazing coaches and teammates, and my freshman year turned out better than I thought it would.
“My big goal was to be a key defensive player and break as many records as I could with blocked shots because of my height.”
In 2009, DeHaan-Clark was the catalyst in Michigan State’s run to the Sweet 16. The Spartans upset top-ranked Duke in the second round before losing to Iowa State, 69-68.
But DeHaan-Clark suffered a back injury during the Big Ten Tournament that winter which ultimately ended her hopes of playing beyond college.
“I never recovered from that, so I didn’t enter the WNBA draft,” DeHaan-Clark said. “I ended up having back surgery and finished my remaining classes before graduating.”
DeHaan-Clark returned home and worked in the medical field while also helping lead a sports ministry program at Grand Valley State University.
She received an intriguing opportunity to continue playing college sports as part of the Lakers volleyball program.
“I needed to take more graduate classes, and I had one more season of college eligibility other than basketball,” she said. “My skill level wasn’t to the level of basketball, but it was still really fun to play and compete and be a part of a team because those are things I still love doing today.”
DeHaan-Clark changed her focus from medicine to continuing her work in sports ministry, as well as for a non-profit organization.
She also got her real estate license in 2015, and she and her husband began flipping houses on the side.
“It brings me a lot of joy to cast a vision of what a home could look like after a lot of blood, sweat and tears,” she said. “I love that kind of work.”
The projects allowed the Clarks to spend meaningful time together.
“It was a lot of nights and weekends, and we just had to learn things as we went,” DeHaan-Clark said. “The one thing we learned is we cannot do drywall. It’s not our skill set, so in order to save our marriage and our relationship we would hire it out.
“We did a lot of it ourselves, and we like seeing the transformation from old to new. It’s really fun, and hopefully we can do it again.”
The Clarks currently reside in Jenison and have been embraced by their community and friends. They live on a lake, enjoying water sports in their free time. Allyssa was inducted into the Grandville High School Athletic Hall of Fame in March.
As for the future, DeHaan-Clark said nothing is set in stone.
“We take it one day at a time,” she said. “I still have my real estate license, so we’re hoping to renovate and invest. I’m sure in the future there will be more kids added to the Clark clan, but right now we’re very happy and content with just one.”
2021-22 Made in Michigan
July 21: Championship Memories Still Resonate with St. Thomas Star Lillard - Read
July 14: Portage Central Champ Rolls to Vanderbilt, Writing Next Chapter in Alabama - Read
July 12: Coaching Couple Passing On Knowledge, Providing Opportunities for Frankfort Wrestlers - Read
June 30: Hrynewich's Star Continuing to Rise with Olympic, Pro Sports Arrivals - Read
PHOTOS (Top) At left, Allyssa DeHaan puts up a shot during Grandville’s 2005 Class A Semifinal against Southfield-Lathrup. At right, the Clark family including Allyssa, husband Aaron Clark and daughter Bradley. (Middle) DeHaan looks for an open teammate while playing her high school finale at her future college home, the Breslin Center. (Below) The Clarks enjoy a moment together. (Basketball photos from MHSAA archives; Clark photos courtesy of Allyssa DeHaan-Clark.)