Impact is the number to start with: the on/off swing per 100 possessions, adjusted for sample size and ranked against the field. The tier comes from that rank (Elite 90+, Strong 70+, Neutral 40+, Below 15+, Drag under 15). A player needs 300+ on and 200+ off possessions, or Impact shows “—”.
Raw is the unadjusted swing: On Net − Off Net. Net is points scored minus allowed per 100; ORtg is scored, DRtg allowed (lower is better).
On/off is measured against a player's own teammates and isn't adjusted for opponent, so a good player on a weak team can post a big swing. Read it as context, not proof.
Seasons on file: 2020-21, 2024-25, 2025-26. On/off needs substitution-level play-by-play, which the NCAA feed only carries for recent seasons.