About The Diamond Rank

The Diamond Rank tracks every reported game in the South Jersey travel baseball scene and turns those results into a single strength rating for each team. The rankings are free and public — no logins, no paywalls. They exist to answer the question every coach, TD, and parent asks all season: how do these teams actually stack up?

Win-loss records can't answer that on their own, because nobody plays the same schedule. A 10-5 team that plays a tough slate can easily be stronger than a 14-1 team that doesn't. A rating that accounts for who you played fixes that.

• Every team starts at 1500. Your rating moves with every result — there's no polling, no eye test, no committee.
• Every game counts. Wins, losses, ties, and the margin all matter. Margins are capped, so running up the score doesn't buy extra points.
• Opponent strength is everything. Beating a top team moves you up a lot; beating a struggling team barely moves you. Losing a close one to a powerhouse can cost you almost nothing.
• Upsets move the needle most. If the ratings expected you to lose and you won, you gain big — the system is always correcting itself toward what teams prove on the field.
• The whole season replays every update. Each new batch of scores re-runs every game in order, so a result reported late still lands in its proper place.
• New teams are labeled honestly. provisional <4 games, thin 4–9, solid 10+ — so you always know how much to trust a number.

We grade ourselves and publish the grade. The standard test is the Brier score — it measures how well a rating system anticipates results (lower is better, and 0.250 is what pure coin-flipping scores). In both divisions, our ratings beat the obvious alternative of just using win percentage:

Only games where both teams already had four or more rated games are used for grading, so the test is honest — no credit for "predicting" games the system had already seen.

For: seeding tournaments by real strength instead of reputation, finding opponents at your level, sanity-checking a schedule before you commit, and tracking whether your team is trending up.

Not for: predicting any single game. This is youth baseball — one hot pitcher or one big inning flips everything, and that's exactly what makes it fun. A rating tells you who's been stronger over a season, not who wins on Saturday.

Scores come from coach reports and verified game results, then get cleaned by hand before they ever touch the ratings: team names are normalized (the same club shows up under a half-dozen spellings out there), duplicates are removed, and every game is verified into the right age division. A rating is only as good as the data underneath it — so the data gets the most care.

Don't see your team's game? It just hasn't been reported yet. Report a score and it'll be in the next weekly update.