SoutheasternOhioPreps.com

Tri-StateYouthSports wrote: ↑Mon Jan 30, 2023 10:00 am

Hookshot wrote: ↑Sun Jan 29, 2023 11:37 pm Is there an explanation somewhere as to how the RPI is established? It’s further off this week than last week.

https://martinrpi.com/about-2/

So what is RPI? In general, RPI (Ratings Percentage Index) is a quantity used to rank sports teams based upon a team’s wins, losses, its strength of schedule, and its opponents’ strength of schedule. There are currently eight states (Colorado, Florida, Iowa, Kentucky, North Carolina, Oregon, Utah, & Washington) that use RPI to rank teams in order to seed/rank teams for postseason tournaments in a manner that is fair, uniform, and completely objective.

Martin RPI Formula = (WP x 35%) + (OWP x 35%) + (OOWP x 25%) + (SSF x 5%)

WP: winning percentage. Just your good ol’ wins and losses.

OWP: average of your opponents’ winning percentages. Calculating the averages of each of your opponents’ winning percentages will give you a slightly different result than if you find the OWP by adding the total number of wins by all your opponents, total number of losses by all your opponents, and finding the winning percentage that way (this is due to the varying number of games each opponent has played. If each of your opponents have played the same number of games, the result will be the same using both methods). If calculating on your own, be sure to average the winning percentages of each of your opponents and not the other way.

OOWP: opponents’ average opponents’ winning percentage. An example for this would be like saying Ohio State gets more points for beating a 15-3 Michigan State team than Dayton would get for beating a 15-3 Davidson team. This is because Michigan State’s 15 wins come against much tougher opponents playing in the Big Ten than Davidson’s opponents in the Atlantic 10 Conference.

SSF: School Size Factor. It’s a leveled point system which makes it slightly more beneficial to play schools larger than you. Table for how that works:
D1: 5.5
D2: 5.0
D3: 4.5
D4: 4.0

For each opponent you’ve played, you’d average these values to obtain your SSF, which makes up 5% of the RPI.

Hookshot wrote: ↑Thu Feb 02, 2023 12:34 pm
Just one quick question. If the Mock Draft is based on the Martin RPI, why would Marietta be seeded 8th when they are 7th in the Martin RPI rankings? Or possibly the Mock Draft has now been updated since Sunday when this thread started?

Tri-StateYouthSports wrote: ↑Thu Feb 02, 2023 1:06 pm

Hookshot wrote: ↑Thu Feb 02, 2023 12:34 pm
Just one quick question. If the Mock Draft is based on the Martin RPI, why would Marietta be seeded 8th when they are 7th in the Martin RPI rankings? Or possibly the Mock Draft has now been updated since Sunday when this thread started?

The MartinRPI rankings from Sunday were used for the Mock Seeding. MartinRPI has been updated since Sunday.