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.
Eagle Provides Decisive Lift as Ishpeming Lands 1st Finals Championship
By
Keith Dunlap
Special for MHSAA.com
March 23, 2024
EAST LANSING — This gave new definition to soaring to new heights on the wings of an eagle.
Through the first 15 minutes of Saturday’s Division 4 championship game against Kingston, Ishpeming sophomore and leading scorer Jenessa Eagle had just two points.
From that point on, nobody on the floor flew higher.
Eagle scored 25 points over the final two quarters plus a minute of the second, finishing with a game-high 27 points to help lead Ishpeming to its first Finals title with a 73-54 win over a Kingston team that also was playing in its first championship game.
“I was really getting into wanting to win,” Eagle said. “I was wanting to do it for my team. I wasn’t really thinking that much. I was just going out and doing what I practiced.”
Ishpeming became the first girls basketball team from the Upper Peninsula to win a Finals championship since Calumet and St. Ignace did so in 2015.
Despite what the final score said, Ishpeming had to navigate some first-half adversity.
Kingston used a 16-2 run late in the first quarter to take a 22-11 lead going into the second. A critical juncture came with 2:34 remaining in the second quarter, when Ishpeming senior Jenna Maki had to leave the game with her third foul.
Kingston held a 26-21 lead at that point, with Maki having scored 16 of the Hematites’ points. But Ishpeming rallied with Maki on the bench, outscoring Kingston 10-4 the rest of the quarter to take a 31-30 lead into halftime.
Eagle and senior Kaitlyn Van Deuren each sank 3-pointers to start the rally, and then Eagle and senior Payton Manninen both added 2-point baskets for the Hematites.
“We have a very trusted bench,” Ishpeming head coach Ryan Reichel said. “Our girls all come in knowing that they have a role where they can compete and do some big things for us. Even when Jenna was out, we knew we had girls who could still put the ball in the basket.”
Ishpeming continued that momentum during the third quarter, forcing six turnovers over the first 1:39 of the frame to build a 39-30 lead. Eagle then caught fire from the outside, draining a couple of deep 3-pointers to give Ishpeming a 47-34 lead with 3:35 to go in the period.
Ishpeming ultimately took a 58-46 lead into the fourth quarter, with Eagle scoring 15 of the team’s 27 points during the third. The Hematites kept up the pressure from there, going on a 10-0 run to take a 73-50 lead with 3:21 remaining and essentially start the celebration.
Maki, the school’s all-time leading scorer, finished a terrific career by adding 24 points to her total and pulling down eight rebounds. She and the rest of Ishpeming’s seniors fulfilled an ambition they have had since they started playing together in kindergarten.
The Hematites won just five games four seasons ago, but skyrocketed quickly and are now on top of the state.
“It really does feel great,” Maki said. “Just like this experience, it feels surreal right now. It’s amazing to see all the fans and all our community who made it down here. It’s a great feeling.”
Senior Abbey Walker had 14 points and 10 rebounds and sophomore Molly Walker scored 14 points for Kingston, which finished a historic season of its own at 27-2.
“This was a great day for Kingston girls basketball,“ Kingston head coach Jay Green said. “There was a huge crowd here supporting us, and we played an outstanding team. The girls gave it all they got. I told their coach after the game that they can make the final four in Division 1, 2, 3 or 4. That team is outstanding. Everybody knows that.”
PHOTOS (Top) Ishpeming players raise their championship trophy Saturday at Breslin Center. (Middle) The Hematites’ Jenessa Eagle gets up a shot with Kingston’s Keria McGarvie (24) and Molly Walker defending. (Below) Jenna Maki (1) launches a 3-point attempt. (Photos by Hockey Weekly Action Photos.)