How DiamondRank Works
DiamondRank turns real youth baseball and softball game results into a common measure of competitive strength. At a high level, a team's DiamondRank reflects two things: who it played and how it performed. A separate Rating Confidence score shows how much reliable game data supports that rating.
In About 30 Seconds
Coaches share or upload GameChanger box scores. DiamondRank confirms the game information. League and tournament administrators can also upload official results in bulk.
Matching independent team submissions are verified and receive full influence. League and tournament administrator results are verified at the source. A one-sided result remains pending for about a week and can then count at reduced influence if no conflict is reported.
New teams begin from a neutral 75.0 DiamondRank. After 5 counted games, a registered team's current season DiamondRank is published. Returning teams may begin the season with a Preseason DR informed by prior-season performance.
Coaches can search for opponents by DiamondRank and distance. Teams within about 7 DR points are the closest starting point for finding competitive matchups.
Who Should We Play Next Weekend?
That is the question DiamondRank is built to help answer. Start with teams close to your DiamondRank, then use distance and availability to narrow the options. Use the DR difference to understand how competitive a game is likely to be:
Once your team is ranked, use the Find Competition tool to search by DiamondRank range, distance, and age group, filter by a specific date, and see which teams have posted open availability and where their fields are.
How DiamondRank Works
Opponent Strength & Game Performance
Who you play matters, and so does how you perform. A result against a stronger opponent carries different information than the same score against a weaker opponent. Score differential is part of the rating but is capped at 12 runs, so running up the score has limited value. Wins and losses do not receive a separate bonus or penalty beyond that.
Continuously Refined, With Recent Form Weighted More
Opponent strength is continuously refined as more results become available. DiamondRank recalculates connected teams so the system can make better use of what the full game history reveals about the competition, and more recent results receive greater emphasis when estimating how a team is playing right now.
A Neutral, Anchored Scale
DiamondRank is displayed on an anchored 50.0–99.9 scale, with 75.0 as the neutral starting and reference point — not a claim that 75.0 is always the mathematical average of every team in the database. The scale isn't stretched based on whichever teams happen to be best or worst right now, and extreme results are compressed toward the ends of the scale so exceptionally strong or weak teams stay distinguishable. Each age group is calculated independently, so a 75 in one age group and a 75 in another aren't meant to predict a head-to-head outcome between them.
Playing Up in Age
Teams that compete up can establish a separate DiamondRank within the older age group's competitive context, shown alongside their primary-age DR. This helps coaches find appropriately matched older opponents — ratings from different age groups shouldn't be treated as directly interchangeable.
Five Games to Publish, a Preseason DR for Returning Teams
A team needs 5 counted current-season games before its DR can be published. Returning teams don't disappear every September — they display a Preseason DR, informed by the prior season but moved back toward the neutral 75.0 reference, until 5 current-season games establish their current-season DR.
How Verification Works
A coach shares or uploads a GameChanger box score, and DiamondRank notifies the opposing coach (when registered) that a result is waiting. If that coach independently submits the matching game, it's verified and receives full influence — the same full influence a result gets when a league or tournament administrator supplies it directly, shown with a 🏟️ (league) or 🏆 (tournament) marker so the source stays visible. If submitted results don't match, the game is excluded from the ranking while both teams and DiamondRank review it. If only one team has submitted a result after 7 days with no conflict, it can begin counting at reduced influence and lowers Rating Confidence — it can still become fully verified later if independently confirmed, and any counted game, including one at reduced influence, can be disputed by any DiamondRank member.
Registration controls whether a team's own DR is displayed publicly, not whether games against that team can contribute to the rating system. DiamondRank can evaluate an unclaimed opponent as its game history develops, even before that team registers.
Rating Confidence: How Well Supported Is the DR?
Rating Confidence is separate from competitive strength. It considers both how many counted games support the rating and how much of that game history has been independently verified or supplied by a league or tournament administrator. More games and stronger verification produce greater confidence.
80%+
High confidence
50–79%
Moderate confidence
<50%
Low confidence
A team can have a high DiamondRank with Low Confidence, or a somewhat lower DiamondRank with High Confidence. That context helps coaches and organizers understand how much evidence sits behind the number.
What Every Term Means
DR — DiamondRank
A team's competitive-strength rating on the anchored 50.0–99.9 scale. Higher is stronger. It reflects who the team played and how it performed, with more recent results carrying greater emphasis.
RD — Run Differential
Runs scored minus runs allowed in a single game, capped at ±12. A win by 8 runs is +8. A loss by 3 is −3. A 20–0 result is capped at +12, so running up the score has limited value.
Frequently Asked Questions
Why can my DiamondRank change even if we did not play a new game?
DiamondRank is connected. Your rating can change as additional results provide new information about the teams you've played, when pending results become counted or verified, when official results are added, or when disputes are resolved.
What's the difference between a league, tournament, exhibition, and scrimmage game?
When you submit a box score, you'll label it as one of the first three below. All three count the same toward your DiamondRank — the label is for clarity, not weighting:
League — a regular-season game against a divisional opponent, part of your organized league's schedule.
Tournament — a pool-play or bracket game played as part of a multi-team tournament.
Exhibition — a game arranged directly against an outside opponent that isn't part of your league schedule or a tournament bracket (sometimes called a "friendly" or crossover game).
Scrimmage — an informal practice game, not an official result. Scrimmages shouldn't be tracked in GameChanger in the first place, so there's no scrimmage option in DiamondRank either — they're never submitted, and never count toward DR.
Can a counted game be disputed?
Yes. Either team can file a dispute on any counted game, including one at reduced influence. Conflicting results are excluded from the ranking while under review, and the affected ratings are recalculated once the dispute is resolved.
What if my team plays up in an older age group?
Each age context needs its own 5 counted games before that DR is established, and Rating Confidence is calculated separately for each. A team can therefore establish a Play-Up DR before establishing its primary-age DR. In that situation, the team may appear as PLAY-UP RATED in its primary-age listing without receiving a primary-age ordinal rank.
Which sports does DiamondRank support?
DiamondRank supports youth baseball and softball. Baseball was the initial testing focus; softball is supported with the same ratings, verification, and Find Competition tools.