Cross-Sport · Era-Adjusted
Every sport now has an era-translated single-season board — “what would this year look like today?” Put them on one shelf and a question follows: whose season stood the furthest above everyone around them? We rank by z — robust standard deviations above the player's own era's positional peers — the one dominance measure that means the same thing whether you played forward in 1996 or running back in 1990.
Each season is z-scored against its own (season, position-group) peer distribution (robust: median & IQR, so outliers don't inflate the bucket) and re-projected onto the group's most-recent rated season. The translated value is within-sport currency and is never compared across sports; only the z is. Thin peer buckets are floored out so an early, sparsely-populated season can never mint a fabricated cross-sport rank. One honest caveat: z is normalized withineach sport's positional peer groups, and sports with finer position granularity (the NFL especially) tend to produce sharper z-tails — so the very top skews toward football. z is the most comparable axis that exists across sports, not a claim that one sport's ceiling is objectively higher. NFL rides its z-native era-adjusted board; NBA, NHL, and MLB ride theirs. MLS is absent — its value model isn't VAL-based, so there is no honest z to place it on this axis.
Seasons that stood equally far above their own eras — near-identical z, different games. The shared z-axis makes the comparison honest: this is what “equally dominant across sports” actually looks like.
Showing 50 of 250 seasons. Ranked by z— robust standard deviations above the player's own era's positional peers. The translated value (→) is that standing re-expressed in the sport's modern currency and is within-sport only; z is the one axis comparable across sports.