JamStats makes tables and plots with roller derby game data from the CRG scoreboard (versions 4.x and later).

You can run it with a live scoreboard, for calling games, or on completed-game JSON files, for team and player stats. Visualize points per jam, lead, mean net points, calloffs, time to initial pass, penalties and much more.

To make Jamstats plots for a completed game, just click “Plot My Jams” on the main page. Then, upload a JSON file saved from your scoreboard. To connect JamStats to a live scoreboard, download the Jamstats tool from GitHub.

Find a bug, or want to request a feature? Open an issue in GitHub.

JamStats is free software developed by TheDM, with Seattle Derby Brats. Like JamStats? Please consider donating to SDB, a 501(c)(3) organization!

JamStats for Announcers

JamStats is a great tool for announcers — even remote announcers! Or anyone else who’s interested in accessing live game data from anywhere in the world. Connect to the scoreboard and get all this live info:

• who’s on the track right now, playing what positions, getting what penalties?
• the last 10 penalties called
• how’s the red jammer out there now been doing, this game? (# of jams jammed, mean time to initial pass, % of jams with lead, total points, mean net points per jam)
• what kinds of penalties is each team racking up?
• how often is each team getting lead / losing lead / calling off?
• what’s the score trend been throughout the game?
• full rosters for both teams and officials
• and more!

Supports access from anywhere on the Internet via wsproxy.

Click on over to Jamstats on GitHub to get started.