DiamondKeeper was built by a baseball parent here in Arizona, on Arizona fields, for a season that runs most of the year. Keeping score is free. Families watch free. And a pitcher's workload follows the athlete across every team he throws for.
Most youth baseball calendars are built around a spring season and a winter break. Ours isn't. Between spring ball, summer tournaments, fall ball and the club schedule that runs through both, a kid here can throw competitively in ten months out of twelve — and that's before lessons and bullpens.
That's a good thing in a lot of ways. It's also the reason a pitch count that only covers one team doesn't tell you much. A player can be inside the limit for his Little League team, inside the limit for his club team, and well past a sensible weekly total for the arm doing all of it.
An arm doesn't know which jersey it was wearing. DiamondKeeper pools counts and required rest across teams, so the family sees the cumulative load rather than each coach seeing a slice of it.
The coach shares a link or a QR code once. Tap it and you're watching — no account, no app store, nothing to buy.
Grandparents out of state use the same link as the parent sitting on the hill. There's no per-family seat to buy, and that doesn't change.
Score fast on any phone, build a fielding rotation that guarantees mandatory-play minimums for Little League, PONY, Cal Ripken or Babe Ruth, and hand your umpires a game clock with a time-limit alert and a pitcher-eligibility list.
Running a tournament weekend anywhere in the Valley, DiamondKeeper pools every pitcher's counts across the whole weekend against your org's rules — USSSA, Perfect Game, Nations, Little League — so you know who's still eligible before the next game starts, not after.
Leagues get a dashboard for teams, rosters and schedules, standings that update as coaches score, a league-wide pitch-count safety report, and a public branded league page.
A 6pm start in August here is not the same outing as a 6pm start in October, and every coach in the Valley already knows it. DiamondKeeper won't tell you whether a player is safe to pitch — no app can, and anything claiming otherwise should be treated carefully. What it does is make the whole picture visible: counts, required rest, velocity trend, and a quick arm check-in, in one place the family controls.
DiamondKeeper provides informational tools and is not a substitute for professional medical advice, diagnosis or treatment. It does not prevent injuries or determine whether an athlete is safe to pitch. Any pain or persistent soreness: see a qualified medical professional.
Keeping score is free and families watch free — no account, no paywall, no trial that expires. Coaches and leagues can add optional paid tools; scoring a game and watching your kid are free.
No. DiamondKeeper opens in whatever browser is already on your phone. Add it to your home screen in a couple of taps and it behaves like any other app.
Your batting numbers can come with you — at-bats, hits, runs, RBIs, walks, strikeouts, doubles, triples, home runs and stolen bases. Pitching totals, pitch counts and game-by-game history don't transfer, because GameChanger's export only covers batting. Full switching guide →
Yes — baseball and softball both.
A single team can start on its own. Nothing has to happen at the league level first.
That's the case this was built around. Counts and rest pool across every team the athlete throws for, so the family sees one total instead of two partial ones.
Open DiamondKeeper in any phone browser and add it to your home screen — or reach out about bringing it to your league.
Open DiamondKeeper in any phone browser and add it to your home screen — or reach out about bringing it to your league.