Impact β the one number to start with: the on/off swing (per 100 possessions)
adjusted for sample size and ranked vs the field. Tier comes from the
vs Field percentile.
90+ Elite70+ Strong40+ Neutral15+ BelowDrag
Raw β the unadjusted swing (On Net β Off Net). A qualifying player needs 300+ on and 200+ off possessions; below that, Impact shows βββ because the sample is too thin to trust.
On Net / Off Net β the team's net rating (points scored minus allowed, per 100) with the player On the court and Off it. Raw impact is On Net β Off Net.
On / Off ORtg β points the team scores per 100 possessions. DRtg β points it allows per 100 (lower is better defense).
On/off is measured relative to a player's own teammates and isn't adjusted for opponent β a good player on a weak team can post a big swing. Read it as context, not proof.