About
The honest all-time NBA team builder
SweepSzn is a free browser game. Spin a franchise reel and an era reel, draft a five-player all-time NBA starting five, and the engine simulates a full 82-game season. The twist: it's honest. Instead of rewarding you for stacking five stat-stuffers, it models the things that actually win an NBA season — and then tells you exactly why your lineup goes 78-4 or 40-42.
The whole hook is the perfect season. Can you build a five that goes 82-0? It's sweep season.
FAQ
- Is SweepSzn free?
- Yes. It runs entirely in your browser, with no account required. Optional Google sign-in just lets you claim your leaderboard ranks and keep them across devices.
- Can you really go 82-0?
- Yes — an undefeated season is achievable, but the engine makes it brutally hard. You need a genuinely balanced two-way five, not five ball-dominant scorers. Going 82-0 is the whole challenge.
- How accurate is the engine?
- Every coefficient is fit to 1,170 real NBA team-seasons (1985–2025) across 24,687 player-seasons, with out-of-sample accuracy of about 6.07 wins RMSE in year-grouped cross-validation. Wins come from a Pythagorean expectation. It is calibrated to history, not hand-tuned.
- Why is it different from other lineup tools?
- Most all-time lineup tools just add up box-score averages, which rewards stacking five high-usage scorers. SweepSzn models finite possessions, usage overload, era-normalized stats, defense at full weight, spacing, and fit — and then explains, in plain English, what helped and what hurt.
- Where does the player data come from?
- Basketball-Reference box scores from 1950 to 2025, normalized per season so different eras can be compared fairly. Pre-1974 defense (before steals and blocks were tracked) is estimated honestly rather than guessed.
- What are the game modes?
- Daily gives everyone the same spins each day and ranks results on a verified leaderboard. Classic shows full stats while you draft. HoopIQ hides them so you draft from memory. Challenge sends a friend the same spins to beat your record.