Between a very good season and a perfect one sits a canyon. Nineteen wins means one afternoon went wrong; twenty means nothing did. This simulator exists to measure that canyon — you assemble a roster of real players from any era, and it tells you, without sentiment, whether the team you built belongs on the one-in-two-hundred list.
▶ Start chasing 20-0 — free, no signupEvery simulated season lands on a ladder that treats perfection as its own category, because it is one:
| Record | Grade | What it says about the roster |
|---|---|---|
| 20-0 | S+ Immortal | No weakness anywhere. The 0.4% club. |
| 19-1 | S Dynasty | One position — usually flex or safety — cost a game. |
| 17–18 wins | A tier | Elite core, visible seams. |
| 13–16 wins | B tier | Playoff team. Star power without depth. |
| Under 13 | C and below | The spins won; you didn't. |
Run enough simulations and the same three leaks appear in every 18-2 and 19-1 team. A quarterback one tier below all-time great — the position's 1.5× weight turns "very good" into two losses by itself. A soft spot at cornerback or edge, the two premium defensive weights. And the quiet killer: a single filler pick taken in round nine because the re-rolls were already spent. Perfect rosters don't have a best player so much as they lack a worst one.
The difficulty here is calibrated by Monte Carlo simulation over tens of thousands of drafts. An expert following a greedy, re-roll-optimal strategy finishes 20-0 roughly 0.4% of the time — about one perfect season per 250 serious runs. Median expert result: 18 wins. A casual first-timer medians around 15. If those numbers feel harsh, that's the point: the only perfect real season in history needed a 1972 Dolphins team that hasn't been repeated in half a century.
Players who eventually post a 20-0 almost always describe the same arc: dozens of 17s and 18s while they learned which eras hide legend quarterbacks, when to burn an era re-roll, and which late-round boards to fear. The simulator's determinism means every one of those lessons is real — nothing you learned gets invalidated by dice. Study your season reports, find your recurring leak, and close it.
Twenty consecutive wins: a 17-0 regular season plus three playoff victories — the modern top-seed's maximum.
Yes, but rarely — roughly 0.4% of expert-level drafts finish perfect. The daily leaderboard shows every verified 20-0 the day it happens.
Good spins are necessary but nowhere near sufficient. Two players given identical spins routinely finish games apart — placement decisions, re-roll timing and position priorities separate them.
Read the offense/defense split in your season report. Whichever unit grades lower is where your next re-roll budget belongs.