Class Curve Atlas
Class Curve Atlas
Last season · 2025-26
Freshmen aged 18 or younger grow the most — +1.6 box plus-minus a season at the median; freshmen aged 20 or older gain +1.0.
The median jump of every shaped band, the band in the sentence markedPosition
Freshman to sophomore
Sophomore to junior
Junior to senior
Senior to an extra year
Each ridge is every same-school jump with 25%+ of minutes in both seasons, by exact age on 1 February. 4,633 jumps with only a birth year and 999 with no birth date are counted in each step's line, not drawn. Hatched bands hold fewer than 20 jumps.
Cohort dossier
Freshman to sophomore, aged 18 or younger
1,403 players · median jump +1.6
NBA outcomes where mature: Star 12 · Starter 29 · Rotation 39 · Fringe 105 · Never 10; 23 with eligibility left, 311 still developing.
Final 2025-26 numbers
The 2026-27 season has no games on its schedule yet. Until then this shows last season, labelled as last season.
Season rates from 2007-08.
| Season | Season rates |
|---|---|
| 2007-08 to 2025-26 | On file |
The floor: every season holds at least 3,000 player seasons. A season under it is named, never hidden.