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.
Shores Star Walker Continues Drive for Hoops Greatness as College Coach
By
Scott DeCamp
Special for MHSAA.com
August 8, 2024
NORTON SHORES — Dribbling, passing, and shooting are prerequisites for basketball players, and Muskegon Mona Shores alumna Jordan Walker did them quite well.
But for Walker, determination has been perhaps her most important trait.
It helped her win the Michigan Miss Basketball Award during her senior season in 2017 after suffering an ACL injury prior to her junior year with the Sailors. It’s also allowed her to continue an ascent in the basketball world.
Time-management habits and prioritization have been instilled in all three of Jarvis and Danielle Walker’s three children.
“There’s a special drive with these (Walker) kids,” said Brad Kurth, who was Jasmyn and Jordan Walker’s basketball coach at Mona Shores.
Jordan Walker earned two master’s degrees over six years of college while juggling the demands of being a Division I basketball player at Western Michigan University and University of Tennessee. The 25-year-old’s playing days appear to be finished, but she’s still pursuing her basketball dreams as an assistant coach at the D-I level.
Walker spent the 2023-24 season as a first-year assistant at Mercer University. This March, Mercer head coach Susie Gardner announced her resignation, meaning Walker had to seek opportunities elsewhere.
In typical Walker fashion, she landed on her feet, and it didn’t take long. In May, she was hired as an assistant coach at Jacksonville University. Her responsibilities include player development with point guards, academics, community service, and housing.
“(The Mercer position) kind of fit exactly where I was at perfectly,” Walker said during a break while on the road recruiting for Jacksonville recently. “I was really thankful for that opportunity and thankful for my circle and my village thinking of me at that time and putting my name out there because it honestly was the perfect situation for me.
“At the Final Four, you meet people and you meet a lot of coaches and you network, you build relationships. There was one coach I saw on the road a ton throughout the year and I saw at the Final Four and he knew the situation. At that point, (Jacksonville) didn’t have any openings, and later on it opened up and they gave me a call. At that point, it was getting to the interview and what the position holds and what it would look like. Again, it was another situation that was perfect for where I was at in life and what I wanted to do and the path that I’m on, so it was another no-brainer for me to head to Jacksonville.”
At Mona Shores, the 5-foot-7 guard broke the school’s all-time scoring record — one that stood 22 years — with 1,365 points. During her Miss Basketball season, Walker averaged 22.1 points, 8.5 rebounds, and 5.5 assists per game.
At the collegiate level, Walker amassed more than 1,300 points, 700 rebounds, and 400 assists. In two seasons with WMU (she lost one season with another ACL injury), she started 54 of 64 games and averaged 11.8 points, 4.9 rebounds, 2.2 assists, and 1.8 steals. As a graduate transfer at Tennessee, she started 77 of 96 games and averaged 6.3 points, 4.1 rebounds, 3.0 assists, and 1.1 steals while helping the Lady Vols reach the NCAA Tournament three times.
According to Walker, the foundation for her success began in the home and in the Mona Shores school community.
“Honestly, my memories with Mona Shores I truly cherish because it’s such a special time, a special place. Playing high school ball, I tell people AAU and high school ball is some of the most fun times that you’ll have playing. Obviously, I enjoyed my college time as well — I did six years,” she quipped. “But I definitely enjoyed my time at Mona Shores. Just the people that were there because it was a truly special place.
“Again, I talk about the village a lot because it does take that and (the) Mona Shores community, they really just poured into me and supported (me) and that’s something that I was always grateful for. Especially my head coach there, Brad Kurth. He did an amazing job with us and preparing us, not only for the games in high school but for the next level as well as far as player development and scouts and going over stuff like that so when I got to college, it wasn’t my first time seeing a scout, it wasn’t my first time doing a film study. Those things I always take with me.”
Of course, with the Walker family, it’s always been books before basketball.
While at Mona Shores, Jordan Walker served on the MHSAA’s Student Advisory Council and earned one of the prestigious MHSAA/Farm Bureau Insurance Scholar-Athlete Awards as a senior; only 32 honorees are selected annually. Walker earned her bachelor’s degree in political science and minor in communications from WMU in 2020, taking only three years. At Tennessee, she completed her first master’s degree in 2022 in business administration (MBA) with a concentration in entrepreneurship and innovation; she finished her second master’s degree in 2023 in the Agricultural Leadership, Education and Communications (ALEC) Department with a concentration on name, image, and likeness (NIL) and women’s leadership.
When Walker suffered the ACL injury at WMU, which sidelined her for a year, it allowed her to get ahead in the classroom. She had 19- and 20-credit semesters that year. In her third and final year at WMU, she was taking 21 credits in a semester.
“Academics in our house was nothing to play around with,” Walker said. “If you didn’t have your academics right — in the summer, if you didn’t finish your workbooks, if you didn’t read your books, you were not playing basketball. Academics were a big thing, and I thank my parents for that because they instilled that at a young age.
“It came down to time management, which kind of goes back to what I was saying about the foundation of your high school and what you do in high school and the habits that you form because that’s ultimately going to carry you throughout college. Of course, you can tweak it and gain new things, but I think Mona Shores did a great job of setting me up academically so that when I got to college, some of the courses that I took, I was able to comprehend at that level and take multiple classes and high-credit semesters and be able to graduate early, which led to me being able to get my (two) master’s (degrees).”
All three of the Walker siblings continue to achieve at a high level on and off the court.
Jasmyn Walker, the eldest of the siblings, was a first-team all-stater at Mona Shores and a Division I basketball player at Valparaiso and Western Michigan. She is in her first season as an assistant coach at George Washington University after previous stops at Purdue-Fort Wayne, Butler, Ferris State and Davenport.
Jarvis Walker II, the youngest of the siblings, was a first-team all-stater at Muskegon High School and is a graduate student playing basketball for Indiana University-Indianapolis after starting his collegiate career at Purdue-Fort Wayne.
The Walker siblings are each other’s biggest fans.
“I’m immensely proud of them,” Jasmyn Walker said. “Jordy and Jay have gone above and beyond to reach their goals. I’ve seen the work they’ve put in, the time invested, and sometimes the lows that come with chasing dreams. They’ve pushed themselves at every turn.”
Jarvis Walker II said that sister Jordan is somebody who will “figure it out no matter the circumstances.”
He believes that each stop along her journey has afforded her great experience and deeper knowledge that will benefit her not only in basketball but in life.
“Grind, grind, grind — she is one of the hardest-working people I know,” he said about his sister. “It has motivated me to be better in every aspect of life from school to basketball and day-to-day interactions and how I go about certain things.”
In many respects, Kurth feels like a proud papa to the Walkers as he’s coached Jasmyn and Jordan and has spent countless hours around the family.
“All three of the kids — I mean, Jarvis, Jordan, and Jasmyn — I could never be prouder of a group of kids,” Kurth said. “You talk about the full package: Basketball is one part, but every single one of them shows academic excellence, every single one of them shows extreme character. Those are things that are timeless. Basketball is a young person’s sport. Coaching you can do a long time, but your playing days are limited. I think I’ve seen a lot of kids sacrifice everything, including their character, including their academics, to do basketball and they shouldn’t. Character should be at the top. These three kids, it’s just matchless.”
Included in Jordan Walker’s long resume is her active participation in leadership programs such as “So You Want To Be a Coach” and “Above the Rim Summit.”
Walker aspires to be a collegiate head coach. She’s doing all she can to keep climbing that ladder.
With her second master’s degree specializing in NIL and that being such a large part of college athletics now, she appears to have a leg up on her competition.
“NIL can look like a bunch of different things, and I think that when choosing a school and what that looks like, make sure that outside of NIL it meets all of your expectations,” Walker said. “Money and brand deals and all of that may look enticing, but still don’t fall on your standards of what your program you want to have has.
“It’s the academics, and if they have your major, and it’s the culture and it’s your relationships with your coaches and your teammates. Make those be your tops and NIL be a plus. I think that that’s the biggest thing.”
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PHOTOS (Top) At left, Jordan Walker stands with her class on the Breslin Center floor during the 2017 MHSAA/Farm Bureau Scholar-Athlete Awards ceremony, and at right in 2023 after receiving her second master's degree from University of Tennessee. (Middle) Walker makes her move toward the basket during a game her senior season at Muskegon Mona Shores. (Below) Jordan Walker, middle, takes a photo with sister Jasmyn and brother Jarvis. (Graduation and family photos courtesy of the Walker family; Mona Shores basketball photo by Tim Reilly.)